diff --git a/tracks.html b/tracks.html
deleted file mode 100644
index 15eb99a..0000000
--- a/tracks.html
+++ /dev/null
@@ -1,274 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Tracks</title>
-  <style>
-    body {
-      padding: 0;
-      margin: 0;
-      overflow: hidden;
-    }
-    #view {
-      padding: .7em;
-
-      font-size: 1.1em;
-
-      position: absolute;
-      bottom: 1em;
-      right: 1em;
-    }
-    #board {
-      width: 100%;
-      height: 100%;
-    }
-    #point {
-      width: 7px;
-      height: 7px;
-      border-radius: 7px;
-      background: #333;
-      position: absolute;
-      top: 56%;
-      left: 50%;
-    }
-    #point.click {
-      background: red;
-    }
-    h3 {
-      text-align: center;
-      display: block;
-      width: 21em;
-      height: 1em;
-      top: 0;
-      right: 0;
-      bottom: 0;
-      left: 0;
-      margin: auto;
-      position: absolute;
-    }
-  </style>
-</head>
-<body>
-  <span id="point"></span>
-  <h3>Moving and click.<br />Press any key to mock the mouse moving.</h3>
-  <div id="output"></div>
-  <script src="min.all.js"></script>
-  <script src="http://cdn.staticfile.org/underscore.js/1.6.0/underscore-min.js"></script>
-  <script src="http://cdn.staticfile.org/jquery/2.1.1-rc2/jquery.min.js"></script>
-  <script>
-    (function() {
-      var requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;
-      window.requestAnimationFrame = requestAnimationFrame;
-
-      var $log = $('#output');
-
-      min.store = new min.memStore();
-      min.multi()
-        .set('tracks:move', [])
-        .set('tracks:click', [])
-        .exec(function() {});
-
-      var $point = $('#point');
-
-      var trackMoving = function() {
-        var pos = {
-          x: 0,
-          y: 0,
-          changed: false
-        };
-
-        window.addEventListener('mousemove', function(evt) {
-          if (Math.abs(evt.clientX - pos.x) + Math.abs(evt.clientY - pos.y) == 0)
-            return pos.changed = false;
-
-          pos.x = evt.clientX;
-          pos.y = evt.clientY;
-          pos.changed = true;
-        });
-        window.addEventListener('moseenter', function(evt) {
-          console.log(evt);
-        });
-
-        return setInterval(function() {
-          if (pos.changed) {
-            min.emit('track:move', pos, Date.now());
-            pos.changed = false;
-          }
-        }, 500);
-      };
-
-      var timer = trackMoving();
-
-      window.addEventListener('click', function(evt) {
-        clearInterval(timer);
-        min.emit('track:click', {
-          x: evt.clientX,
-          y: evt.clientY
-        }, Date.now());
-        timer = trackMoving();
-      });
-
-      min
-        .on('track:move', function(pos, time) {
-          min.sadd('tracks:move', {
-            time: time, 
-            x: pos.x,
-            y: pos.y
-          });
-        })
-        .on('track:click', function(pos, time) {
-          min.sadd('tracks:click', {
-            time: time, 
-            x: pos.x,
-            y: pos.y
-          });
-        });
-
-      var movements = [];
-
-      min.on('sadd', function(key) {
-        min.smembers(key).then(function(members) {
-          var pos = members[members.length - 1];
-
-          $log.append()
-
-          console.log(key.substr(7) + ' (%d, %d)', pos.x, pos.y);
-
-          movements.push(pos);
-        });
-      });
-
-      var STEPS = 200;
-
-      function caculatePattern(per, points, ary) {
-        var arr = [];
-        var node = points.reduce(function(prev, curr, index) {
-          var __prev = points[index - 1];
-
-          var point = {
-            x: __prev.x + (curr.x - __prev.x) * per,
-            y: __prev.y + (curr.y - __prev.y) * per
-          };
-
-          arr.push(point);
-          return point;
-        });
-
-        if (arr.length > 1) {
-          caculatePattern(per, arr, ary);
-        } else {
-          ary.push(node);
-        }
-
-        return ary;
-      }
-
-      function caculatePath(points) {
-        var path = [];
-
-        for (var i = 0; i < STEPS; i++) {
-          path = path.concat(caculatePattern(i / STEPS, points, []));
-        }
-
-        return path;
-      }
-
-      function mockPath(callback) {
-        min.multi()
-          .smembers('tracks:move')
-          .smembers('tracks:click')
-          .exec(function(err, results) {
-            if (err) {
-              return console.error(err);
-            }
-
-            var moves = results[0][0];
-            var clicks = results[1][0];
-
-            var patterns = [];
-
-            var firstPos = moves[0];
-            var firstClick = clicks[0];
-
-            if (firstClick.time > firstPos.time) {
-              moves.splice(0, 1);
-              clicks.unshift(firstPos);
-            }
-
-            clicks.slice(1).forEach(function(click, index) {
-              var hits = _.filter(moves, function(movement) {
-                return movement.time < click.time && movement.time > clicks[index].time;
-              });
-
-              var rtn = [ clicks[index] ].concat(hits);
-              rtn.push(click);
-
-              patterns.push(rtn);
-            });
-
-            var path = [];
-
-            patterns.forEach(function(pattern) {
-              path = path.concat(caculatePath(pattern));
-            });
-
-            callback(path, patterns);
-          });
-      }
-
-      function execPath(path, callback) {
-        (function loop(index) {
-          var curr = path[index];
-
-          if (curr) {
-            $point.animate({
-              left: curr.x - 3.5,
-              top: curr.y - 3.5
-            }, 4, function() {
-              loop(++index);
-            })
-          } else {
-            return callback();
-          }
-        })(0);
-      }
-
-      var mocking = false;
-      window.addEventListener('keypress', function(evt) {
-        if (mocking) return;
-
-        mocking = true;
-        mockPath(function(path, patterns) {
-          requestAnimationFrame(function() {
-            (function loop(index) {
-              var curr = patterns[index];
-
-              if (curr) {
-                execPath(path, function() {
-                  $point.addClass('click');
-
-                  setTimeout(function() {
-                    $point.removeClass('click');
-                  }, 1000);
-
-                  loop(++index);
-                })
-              } else {
-                mocking = false;
-                min.multi()
-                  .set('tracks:move', [])
-                  .set('tracks:click', [])
-                  .exec(function() {
-                    console.log('done');
-                  });
-              }
-            })(0);
-          });
-        });
-        
-        return false;
-      });
-    })();
-  </script>
-</body>
-</html>
\ No newline at end of file
