diff --git a/mirva/__init__.py b/mirva/__init__.py
index 8090ba2..ccd7f8b 100644
--- a/mirva/__init__.py
+++ b/mirva/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "20220328.0"
+__version__ = "20220607.0"
 
 
 def get_version():
diff --git a/mirva/mirva.py b/mirva/mirva.py
index d6f32f9..8b9d042 100755
--- a/mirva/mirva.py
+++ b/mirva/mirva.py
@@ -4,8 +4,11 @@ import sys
 import re
 import shutil
 import subprocess
-from argparse import ArgumentParser
+import random
+from argparse import ArgumentParser, HelpFormatter
+
 from mirva import get_version
+from tqdm import tqdm
 
 
 class Mirva:
@@ -22,23 +25,48 @@ class Mirva:
             ".*\.jpg$|.*\.jpeg$|.*\.png$|.*\.gif$|.*\.tif$", re.I
         )
         self.video_match = re.compile(".*\.mp4$", re.I)
+        self.site_defaults = {
+            "title": {"default": "", "help": "Title of the site"},
+            "sub_title": {
+                "default": "",
+                "help": "Subtitle of the site, shown under the title",
+            },
+            "intro": {
+                "default": "",
+                "help": "Intro text shown before first image",
+            },
+            "image_size": {
+                "default": "1920",
+                "help": "Resize images for faster loading. Use 'link' for symbolic links without resizing.",
+            },
+            "scroll": {
+                "default": "smooth",
+                "help": "Transition to next image with keyboard: smooth or auto",
+            },
+        }
+
+        ## Init ##
         self.get_options()
         os.chdir(self.options.folder)
-        self.write_resources()
         self.file_list = self.get_files()
-        if self.options.config or not os.path.exists(self.config_file):
-            self.create_config()
-            print(
-                "Config created: Exiting without gallery creation. Check config first."
-            )
-            return
-        self.get_config()
-        if self.options.exif:
-            self.append_exif()
-        self.create_posts()
-        self.write_index()
-        self.write_mediums()
-        print("Gallery written.")
+
+        if self.run_commands["config"]:
+
+            self.write_resources()
+            updated = self.create_config()
+            if updated:
+                print(
+                    "Config created or updated: Check config contents: {}".format(
+                        self.config_file
+                    )
+                )
+
+        if self.run_commands["generator"]:
+            self.get_config()
+            self.create_posts()
+            self.write_index()
+            self.write_mediums()
+            print("Gallery written.")
 
     def create_config(self):
 
@@ -46,23 +74,48 @@ class Mirva:
         self.config.read(self.config_file)
         config_changed = False
         if not "SITE" in self.config:
-            self.config["SITE"] = {
-                "title": "",
-                "sub_title": "",
-                "intro": "",
-                "image_size": 850,
-            }
+            self.config["SITE"] = {}
             config_changed = True
 
+        for key in self.site_defaults:
+            if not key in self.config["SITE"]:
+                config_changed = True
+                self.config["SITE"][key] = self.site_defaults[key]["default"]
+
+        if self.options.set:
+            for key, value in self.options.set:
+                if key not in self.site_defaults:
+                    raise KeyError("Key '{}' is not a config keyword".format(key))
+                self.config["SITE"][key] = value
+                config_changed = True
+
         for f in self.file_list:
             if not f in self.config:
                 title, _ = os.path.splitext(f)
                 title = title.replace("_", " ")
                 self.config[f] = {"title": title, "description": ""}
                 config_changed = True
+                print("Added {}".format(f))
+
+        if self.options.purge:
+            unnecessary = []
+            for f in self.config:
+                if f in ("SITE", "DEFAULT"):
+                    continue
+                if f not in self.file_list:
+                    print("{} not found in files".format(f))
+                    unnecessary.append(f)
+            for f in unnecessary:
+                del self.config[f]
+                config_changed = True
+
+        if self.options.exif:
+            self.append_exif()
+            config_changed = True
 
         if config_changed:
             self.write_config()
+        return config_changed
 
     def create_posts(self):
 
@@ -93,7 +146,6 @@ class Mirva:
             self.config.write(fp)
 
     def get_files(self):
-        image_match = re.compile(".*\.jpg$|.*\.jpeg$|.*\.png$|.*\.gif$|.*\.tif$", re.I)
         files = []
         for f in sorted(os.listdir(".")):
             if f.startswith("."):
@@ -104,24 +156,24 @@ class Mirva:
         return files
 
     def get_options(self):
-        parser = ArgumentParser(
-            prog="mirva",
-            epilog='Configuration note: item "image_size = [integer]" is the '
-            + "middle sized image max width/height in pixels. It also accepts a special "
-            + 'value "link" to make symbolic links.',
-        )
-        # parser.add_argument("-v", default=False, action="store_true")
+        parser = ArgumentParser(prog="mirva", formatter_class=SmartFormatter)
         parser.add_argument(
-            "--config",
-            default=False,
-            action="store_true",
-            help="Write config and exit. Required if more images are added.",
+            "--version",
+            action="version",
+            version="%(prog)s {version}".format(version=get_version()),
         )
         parser.add_argument(
-            "--force",
+            "--folder",
+            type=str,
+            default=".",
+            help="Folder for gallery. Default current folder.",
+        )
+
+        parser.add_argument(
+            "--purge",
             default=False,
             action="store_true",
-            help="Force regeneration of middle sized images",
+            help="Remove non-existent files in image list. Required if images are removed.",
         )
         parser.add_argument(
             "--exif",
@@ -130,20 +182,43 @@ class Mirva:
             help="Append EXIF information to image descriptions",
         )
         parser.add_argument(
-            "--version",
-            action="version",
-            version="%(prog)s {version}".format(version=get_version()),
+            "--set",
+            "-s",
+            default=None,
+            nargs=2,
+            action="append",
+            metavar=("key", "value"),
+            help="smart|Configurable options: \n"
+            + "\n".join(
+                ["{}: {}".format(k, v["help"]) for k, v in self.site_defaults.items()]
+            ),
+        )
+
+        parser.add_argument(
+            "--force",
+            default=False,
+            action="store_true",
+            help="Force regeneration of middle sized images",
         )
         parser.add_argument(
-            "folder",
-            type=str,
-            default=".",
-            nargs="?",
-            help="Folder for gallery",
+            "--command",
+            "-c",
+            default="all",
+            action="store",
+            choices=["all", "config", "generator"],
+            help="Run only part of the process. Defaults to all. Config is run always if it doesn't exist.",
         )
-        self.options = parser.parse_args()
 
-    def get_index(self, page_title, sub_title, intro, posts):
+        self.options = parser.parse_args()
+        self.run_commands = {
+            "config": self.options.command == "config"
+            or self.options.command == "all"
+            or not os.path.exists(self.config_file),
+            "generator": self.options.command == "generator"
+            or self.options.command == "all",
+        }
+
+    def get_index(self, posts):
 
         return """<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 <!--
@@ -164,10 +239,10 @@ Released   : 20110306
 <meta http-equiv="content-type" content="text/html; charset=utf-8" />
 <link rel="shortcut icon" href="{resource}/mirva.ico"/>
 <title>{page_title}</title>
-<link href="{resource}/style.css" rel="stylesheet" type="text/css" media="screen" />
+<link href="{resource}/mirva.css" rel="stylesheet" type="text/css" media="screen" />
 <script src="{resource}/mirva.js"></script>
 </head>
-<body>
+<body data-scroll="{scroll}">
 <div id="wrapper">
     <div id="header">
         <div id="logo">
@@ -183,7 +258,7 @@ Released   : 20110306
         <div id="page-bgbtm">
           <div id="content">
             <div class="post">
-              <div class="entry">
+              <div class="entry intro">
                 {intro}
               </div>
             </div>
@@ -199,9 +274,10 @@ Released   : 20110306
 </div>
 </body>
 </html>""".format(
-            page_title=page_title,
-            sub_title=sub_title,
-            intro=intro,
+            page_title=self.config["SITE"]["title"],
+            sub_title=self.config["SITE"]["sub_title"],
+            intro=self.config["SITE"]["intro"],
+            scroll=self.config["SITE"]["scroll"],
             posts="\n".join(posts),
             resource=self.resource_dir,
         )
@@ -212,7 +288,7 @@ Released   : 20110306
             return """
                 <div class="post">
                     <div class="navigation">&nbsp;</div>
-                    <div class=center><a href="{image}">
+                    <div class="image_wrapper center"><a href="{image}">
                         <video class=post_image controls preload="metadata">
                             <source src="{image}" type="video/mp4" >
                         </video>
@@ -227,7 +303,9 @@ Released   : 20110306
         return """
             <div class="post">
                 <div class="navigation">&nbsp;</div>
-                <div class=center><a href="{image}"><img loading=lazy class=post_image src="{med_dir}/{image}.jpg"></a></div>
+                <div class="image_wrapper center"><a href="{image}">
+                    <img loading=lazy class=post_image src="{med_dir}/{image}.jpg">
+                </a></div>
                 <div class="meta"><div class="name">{title}</div></div>
                 <div style="clear: both;">&nbsp;</div>
                 <div class="entry">{content}</div>
@@ -253,14 +331,7 @@ Released   : 20110306
                 sys.exit(1)
 
         with open("index.html", "wt") as fp:
-            fp.write(
-                self.get_index(
-                    self.config["SITE"]["title"],
-                    self.config["SITE"]["sub_title"],
-                    self.config["SITE"]["intro"],
-                    self.posts,
-                )
-            )
+            fp.write(self.get_index(self.posts))
 
     def write_resources(self):
 
@@ -270,19 +341,47 @@ Released   : 20110306
             pass
 
         for f in (
-            "style.css",
+            "mirva.css",
             "arrow_up.png",
             "arrow_down.png",
-            "banner.jpg",
             "mirva.ico",
             "mirva.js",
         ):
             if os.path.exists(os.path.join(self.resource_dir, f)):
                 continue
             shutil.copy(
-                os.path.join(self.resource_src, f), os.path.join(self.resource_dir, f)
+                os.path.join(self.resource_src, f),
+                os.path.join(self.resource_dir, f),
             )
 
+        if not os.path.exists(os.path.join(self.resource_dir, "banner.jpg")):
+            try:
+                f = random.choice(self.file_list)
+                outfile = os.path.join(self.resource_dir, "banner.jpg")
+                res = "1920x"
+                convargs = [
+                    "convert",
+                    "{}[0]".format(f),
+                    "-background",
+                    "white",
+                    "-flatten",
+                    "-resize",
+                    res,
+                    "+contrast",
+                    "+contrast",
+                    "+contrast",
+                    "-quality",
+                    "85",
+                    outfile,
+                ]
+                subprocess.run(convargs)
+                print("Random banner written to {}".format(outfile))
+            except Exception:
+                shutil.copy(
+                    os.path.join(self.resource_src, "banner.jpg"),
+                    os.path.join(self.resource_dir, "banner.jpg"),
+                )
+
     def write_mediums(self):
 
         try:
@@ -290,14 +389,14 @@ Released   : 20110306
         except Exception:
             pass
 
-        r = self.config["SITE"].get("image_size", 850)
+        r = self.config["SITE"].get("image_size", 1920)
         link = str(r).lower() == "link"
         if link:
             r = 0
 
         res = "{:d}x{:d}>".format(int(r), int(r))
         force = self.options.force
-        for f in self.file_list:
+        for f in tqdm(self.file_list):
             if self.video_match.match(f):
                 continue
             outfile = os.path.join(self.medium_dir, "{}.jpg".format(f))
@@ -309,14 +408,11 @@ Released   : 20110306
 
             if not os.path.exists(outfile):
                 if link:
-                    # TODO: Get absolute path to f?
                     os.symlink("../../{}".format(f), outfile)
                     continue
 
                 convargs = [
                     "convert",
-                    "-define",
-                    "jpeg:size={}x{}".format(r, r),
                     "{}[0]".format(f),
                     "-background",
                     "white",
@@ -327,8 +423,6 @@ Released   : 20110306
                     "85",
                     outfile,
                 ]
-                sys.stdout.write(".")
-                sys.stdout.flush()
                 subprocess.run(convargs)
         sys.stdout.write("\n")
 
@@ -359,7 +453,6 @@ Released   : 20110306
 
                 self.config[f]["description"] += p.stdout.decode("utf-8")
         sys.stdout.write("\n")
-        self.write_config()
 
 
 def human_size(file_name, precision=1):
@@ -379,3 +472,10 @@ def human_size(file_name, precision=1):
         size = size / 1024.0
         defPrecision = precision
     return "%s%.*f%s" % (sign, defPrecision, size, suffixes[suffixIndex])
+
+
+class SmartFormatter(HelpFormatter):
+    def _split_lines(self, help, width):
+        if help.startswith("smart|"):
+            return help[6:].splitlines()
+        return HelpFormatter._split_lines(self, help, width)
\ No newline at end of file
diff --git a/mirva/resources/arrow_down.png b/mirva/resources/arrow_down.png
index 6dbc50c..83aeb49 100644
Binary files a/mirva/resources/arrow_down.png and b/mirva/resources/arrow_down.png differ
diff --git a/mirva/resources/arrow_up.png b/mirva/resources/arrow_up.png
index e25e8fb..ffbb505 100644
Binary files a/mirva/resources/arrow_up.png and b/mirva/resources/arrow_up.png differ
diff --git a/mirva/resources/style.css b/mirva/resources/mirva.css
similarity index 98%
rename from mirva/resources/style.css
rename to mirva/resources/mirva.css
index 6ff3db2..3b5ecdb 100644
--- a/mirva/resources/style.css
+++ b/mirva/resources/mirva.css
@@ -64,7 +64,7 @@ a:hover {
     height: 330px;
     margin: 0 auto;
     padding: 0px;
-    background: url(banner.jpg) no-repeat left top;
+    background: url(banner.jpg) no-repeat center center;
     background-size: cover;
 }
 
@@ -264,4 +264,4 @@ a:hover {
 
 .float_down {
   float: left;
-}
+}
\ No newline at end of file
diff --git a/mirva/resources/mirva.js b/mirva/resources/mirva.js
index 9f09d31..39a0a08 100644
--- a/mirva/resources/mirva.js
+++ b/mirva/resources/mirva.js
@@ -1,82 +1,156 @@
-let current=-1;
-function r(f){/in/.test(document.readyState)?setTimeout('r('+f+')',9):f()}
-r(function(){
-    create_nav();
-    document.onkeydown = keyboard_entry;
-    document.onwheel = scroll_event;
+let current = -1;
+let currentScrolled = -1;
+let scrollTimer = null;
+let scrollEventTimer = null;
 
+function r(f) {
+  /in/.test(document.readyState) ? setTimeout('r(' + f + ')', 9) : f()
+}
+r(function() {
+  create_nav();
+  document.onkeydown = keyboard_entry;
 });
+
 function create_nav() {
   let navis = document.getElementsByClassName("navigation");
-  for (let i = 0; i<navis.length; i++) {
-    if (i==navis.length-1) {
+  for (let i = 0; i < navis.length; i++) {
+    if (i == navis.length - 1) {
       navis[i].appendChild(create_button("up", navis[0], 0));
       continue;
     }
-    if (navis[i-1]) {
-      navis[i].appendChild(create_button("up", navis[i-1], i-1));
+    if (navis[i - 1]) {
+      navis[i].appendChild(create_button("up", navis[i - 1], i - 1));
     } else {
       navis[i].appendChild(create_button("up", document.body, 0));
     }
-    if (navis[i+1]) {
-      navis[i].appendChild(create_button("down", navis[i+1], i+1));
+    if (navis[i + 1]) {
+      navis[i].appendChild(create_button("down", navis[i + 1], i + 1));
     }
   }
 }
+
 function create_button(direction, to, next) {
   let container = document.createElement('div');
   container.classList.add("float_" + direction);
   let button = document.createElement('img');
-  button.src  = ".mirva/arrow_" + direction + ".png";
+  button.src = ".mirva/arrow_" + direction + ".png";
   button.classList.add("navigation_button");
-  button.onclick = function(){
-      to.parentElement.scrollIntoView({behavior: "smooth"});
-      current = next;
+  button.onclick = function() {
+    to.parentElement.scrollIntoView({
+      behavior: "smooth"
+    });
+    current = next;
   };
   container.appendChild(button);
   return container
 }
-function is_visible(el) {
-    let rect = el.getBoundingClientRect();
+
+function is_visible(el, type) {
+  let rect = el.getBoundingClientRect();
+  if (type == "fully") {
+    return rect.top >= 0 && rect.top < window.innerHeight && rect.bottom >= 0 && rect.bottom <= window.innerHeight
+  } else {
     return rect.top < window.innerHeight && rect.bottom >= 0;
-}
-function scroll_event(ev) {
-  let navis = document.getElementsByClassName("navigation");
-  for (let i = 0; i<navis.length; i++) {
-    if (is_visible(navis[i])) {
-        current = i -1;
-        return
-    }
   }
 }
+
+
+function get_position() {
+  let intro = document.getElementsByClassName("intro");
+    for (let i = 0; i < intro.length; i++) {
+      if (is_visible(intro[i], "fully")) {
+        return {
+          "current": -1,
+          "next": 0,
+          "previous": -1,
+          "type": "top"
+        }
+      }
+    }
+  let posts = document.getElementsByClassName("image_wrapper");
+  for (let i = 0; i < posts.length; i++) {
+    if (is_visible(posts[i], "fully")) {
+      return {
+        "current": i,
+        "next": i + 1,
+        "previous": i - 1,
+        "type": "full"
+      }
+    }
+  }
+  let partials = [];
+  for (let i = 0; i < posts.length; i++) {
+    if (is_visible(posts[i], "partial")) {
+      partials.push(i)
+    }
+  }
+  if (partials.length == 1) {
+    return {
+      "current": partials[0],
+      "next": partials[0] + 1,
+      "previous": partials[0] - 1,
+      "type": "partial single"
+    }
+
+  }
+  if (partials.length > 1) {
+    return {
+      "current": partials[0],
+      "next": partials[0] + 1,
+      "previous": partials[0],
+      "type": "partial multi"
+    }
+  }
+  return {
+    "current": current,
+    "next": current + 1,
+    "previous": current - 1,
+    "type": "unknown"
+  }
+}
+
 function keyboard_entry(ev) {
   let kC = ev.keyCode;
   let ctrlDown = ev.ctrlKey || ev.metaKey;
   if (ctrlDown) {
     return;
   }
-  if ([32,33,34,35,36,37,38,39,40].indexOf(kC) == -1) {
-      return
+  if ([32, 33, 34, 35, 36, 37, 38, 39, 40].indexOf(kC) == -1) {
+    return
   }
-  let navis = document.getElementsByClassName("navigation");
+  let posts = document.getElementsByClassName("image_wrapper");
+  let position = get_position();
   if (kC == '36') { // home
-      current = -1;
-      return
-  }
-  else if (kC == '35') { // end
-      current = navis.length;
-      return
-  }
-  else if (kC == '39') { // right
-      current += 1;
-  }
-  else if (kC == '37') { // left
-      current -= 1;
+    return
+  } else if (kC == '35') { // end
+    return
+  } else if (kC == '39') { // right
+    current = position.next;
+  } else if (kC == '37') { // left
+    current = position.previous;
   } else {
-      setTimeout(scroll_event, 100);
+    return
+  }
+  if (current == -1) {
+      window.scrollTo({ top: 0, behavior: 'smooth' });
       return
   }
   current = Math.max(0, current);
-  current = Math.min(navis.length-1, current);
-  navis[current].parentElement.scrollIntoView({behavior: "smooth"});
-}
+  current = Math.min(posts.length - 1, current);
+  /* Scroll smooth, if no frequent keypress */
+  if (scrollTimer) {
+    posts[current].parentElement.scrollIntoView({
+      behavior: "auto"
+    });
+    clearTimeout(scrollTimer);
+  } else {
+    posts[current].parentElement.scrollIntoView({
+      behavior: "smooth"
+    });
+  }
+  scrollTimer = setTimeout(function() {
+      scrollTimer = null;
+    },
+    200
+  );
+}
\ No newline at end of file
diff --git a/setup.py b/setup.py
index e62edf7..b400523 100644
--- a/setup.py
+++ b/setup.py
@@ -11,4 +11,5 @@ setup(
             "mirva=mirva:main",
         ],
     },
+    install_requires=["tqdm"],
 )