diff --git a/assets/js/ext/oktween.js b/assets/js/ext/oktween.js
deleted file mode 100644
index 41edbb0..0000000
--- a/assets/js/ext/oktween.js
+++ /dev/null
@@ -1,167 +0,0 @@
-/*
-  oktween.add({
-    obj: el.style,
-    units: "px",
-    from: { left: 0 },
-    to: { left: 100 },
-    duration: 1000,
-    easing: oktween.easing.circ_out,
-    update: function(obj){
-      console.log(obj.left)
-    }
-    finished: function(){
-      console.log("done")
-    }
-  })
-*/
-
-var oktween = (function(){
-  var oktween = {}
-  var tweens = oktween.tweens = []
-  var last_t = 0
-  var id = 0
-  oktween.speed = 1
-  oktween.raf = requestAnimationFrame
-  oktween.add = function(tween){
-    tween.id = id++
-    tween.obj = tween.obj || {}
-    if (tween.easing) {
-      if (typeof tween.easing == "string") {
-        tween.easing = oktween.easing[tween.easing]
-      }
-    }
-    else {
-      tween.easing = oktween.easing.linear
-    }
-    if (! ('from' in tween) && ! ('to' in tween)) {
-      tween.keys = []
-    }
-    else if (! ('from' in tween) ) {
-      tween.from = {}
-      tween.keys = Object.keys(tween.to)
-      tween.keys.forEach(function(prop){
-        tween.from[prop] = parseFloat(tween.obj[prop])
-      })
-    }
-    else {
-      tween.keys = Object.keys(tween.from)
-    }
-    tween.delay = tween.delay || 0
-    tween.start = last_t + tween.delay
-    tween.done = false
-    tween.after = tween.after || []
-    tween.then = function(fn){ tween.after.push(fn); return tween }
-    tween.cancel = function(){
-      var index = tweens.indexOf(tween)
-      if (index != -1) tweens.splice(index, 1)
-      tween.obj = null
-      tween.after = null
-      tween.done = null
-    }
-    tween.tick = 0
-    tween.skip = tween.skip || 1
-    tween.dt = 0
-    tweens.push(tween)
-    return tween
-  }
-  oktween.update = function(t) {
-    oktween.raf(oktween.update)
-    last_t = t * oktween.speed
-    if (tweens.length == 0) return
-    var done = false
-    tweens.forEach(function(tween, i){
-      var dt = Math.min(1.0, (t - tween.start) / tween.duration)
-      tween.tick++
-      if (dt < 0 || (dt < 1 && (tween.tick % tween.skip != 0))) return
-      var ddt = tween.dt = tween.easing(dt)
-      tween.keys.forEach(function(prop){
-        val = lerp( ddt, tween.from[prop], tween.to[prop] )
-        if (tween.round) val = Math.round(val)
-        if (tween.units) val = (Math.round(val)) + tween.units
-        tween.obj[prop] = val
-      })
-      tween.update && tween.update(tween.obj, dt)
-      if (dt == 1) {
-        tween.finished && tween.finished(tween)
-        if (tween.after.length) {
-          var twn = tween.after.shift()
-          twn.obj = twn.obj || tween.obj
-          twn.after = tween.after
-          oktween.add(twn)
-        }
-        if (tween.loop) {
-          tween.start = t + tween.delay
-        }
-        else {
-          done = tween.done = true
-        }
-      }
-    })
-    if (done) {
-      tweens = tweens.filter(function(tween){ return ! tween.done })
-    }
-  }
-  function lerp(n,a,b){ return (b-a)*n+a }
-
-  // requestAnimationFrame(oktween.update)
-
-  oktween.easing = {
-    linear: function(t){
-      return t
-    },
-    circ_out: function(t) {
-      return Math.sqrt(1 - (t = t - 1) * t)
-    },
-    circ_in: function(t){
-      return -(Math.sqrt(1 - (t * t)) - 1)
-    },
-    circ_in_out: function(t) {
-      return ((t*=2) < 1) ? -0.5 * (Math.sqrt(1 - t * t) - 1) : 0.5 * (Math.sqrt(1 - (t -= 2) * t) + 1)
-    },
-    quad_in: function(n){
-      return Math.pow(n, 2)
-    },
-    quad_out: function(n){
-      return n * (n - 2) * -1
-    },
-    quad_in_out: function(n){
-      n = n * 2
-      if(n < 1){ return Math.pow(n, 2) / 2 }
-      return -1 * ((--n) * (n - 2) - 1) / 2
-    },
-    cubic_bezier: function (mX1, mY1, mX2, mY2) {
-      function A(aA1, aA2) { return 1.0 - 3.0 * aA2 + 3.0 * aA1; }
-      function B(aA1, aA2) { return 3.0 * aA2 - 6.0 * aA1; }
-      function C(aA1)      { return 3.0 * aA1; }
-
-      // Returns x(t) given t, x1, and x2, or y(t) given t, y1, and y2.
-      function CalcBezier(aT, aA1, aA2) {
-        return ((A(aA1, aA2)*aT + B(aA1, aA2))*aT + C(aA1))*aT;
-      }
-
-      // Returns dx/dt given t, x1, and x2, or dy/dt given t, y1, and y2.
-      function GetSlope(aT, aA1, aA2) {
-        return 3.0 * A(aA1, aA2)*aT*aT + 2.0 * B(aA1, aA2) * aT + C(aA1);
-      }
-
-      function GetTForX(aX) {
-        // Newton raphson iteration
-        var aGuessT = aX;
-        for (var i = 0; i < 10; ++i) {
-          var currentSlope = GetSlope(aGuessT, mX1, mX2);
-          if (currentSlope == 0.0) return aGuessT;
-          var currentX = CalcBezier(aGuessT, mX1, mX2) - aX;
-          aGuessT -= currentX / currentSlope;
-        }
-        return aGuessT;
-      }
-
-      return function(aX) {
-        if (mX1 == mY1 && mX2 == mY2) return aX; // linear
-        return CalcBezier(aX, mY1, mY2);
-      }
-    }
-  }
-  
-  return oktween
-})()
diff --git a/index.html b/index.html
index 68f7067..fc9c2c8 100644
--- a/index.html
+++ b/index.html
@@ -87,8 +87,6 @@
   <input type="text" id="cursor_input">
 
 </body>
-<script src="assets/js/ext/oktween.js"></script>
-
 <script src="assets/js/ext/util.js"></script>
 <script src="assets/js/ext/unicode.js"></script>
 <script src="assets/js/ext/color.js"></script>