diff --git a/index.html b/index.html
index 3d0dc62..324a291 100644
--- a/index.html
+++ b/index.html
@@ -29,9 +29,9 @@ var _COLOR_GRASS = '#388E3C',
     _COLOR_HOLE = '#000000',
     _COLOR_BRACKET = '#000000'
 
-    
+
   var _MAX_BRACKET = 100,
-      _BALL_SPEED = 50,
+      _BALL_SPEED = 100,
       _BALL_SPEED_THRESHOLD = 10
 
   $(function(){
@@ -44,13 +44,13 @@ var _COLOR_GRASS = '#388E3C',
     drawBorder(23+5, 500+10-5, 500-10, 5)
     drawBorder(500+23-5, 10+5, 5, 500-10)
     drawHole(432, 366)
-    setInterval(animLoop, 10)
+    setInterval(animLoop, 5)
 
     $(document).mousemove(function(e){
       pX = e.pageX - $('canvas').offset().left
       pY = e.pageY - $('canvas').offset().top
     })
-    
+
     $(document).mousedown(function(e){
       var strength = Math.hypot(pX - bX, pY - bY)
       if(strength > _MAX_BRACKET)
@@ -79,7 +79,7 @@ var _COLOR_GRASS = '#388E3C',
   // var i = 0
   function animLoop() {
     ctx.clearRect(0, 0, $('canvas').width(), $('canvas').height());
-    
+
     if(bVec != null){
       collide()
       drawBall(bX = bX-bVec[0], bY = bY-bVec[1])
@@ -110,7 +110,7 @@ var _COLOR_GRASS = '#388E3C',
     staticctx.fillStyle = 'red'
     staticctx.fillRect(border.x, border.y, border.width, border.height)
   }
-  
+
   function drawDebugBorderUndo(border) {
     staticctx.fillStyle = _COLOR_BORDER
     staticctx.fillRect(border.x, border.y, border.width, border.height)
@@ -141,7 +141,7 @@ var _COLOR_GRASS = '#388E3C',
       x = bX+_MAX_BRACKET*Math.cos(angle)
       y = bY+_MAX_BRACKET*Math.sin(angle)
     }
-    
+
     ctx.beginPath()
     ctx.moveTo(bX, bY)
     ctx.lineTo(x, y)
@@ -200,18 +200,18 @@ var _COLOR_GRASS = '#388E3C',
     }
     if(coll[1]){
       console.log('top < 0');
-      bVec = [bVec[0], Math.abs(bVec[1])] 
+      bVec = [bVec[0], Math.abs(bVec[1])]
     }
     if(coll[2]){
       console.log('right > 0');
-      bVec = [-Math.abs(bVec[0]), bVec[1]] 
+      bVec = [-Math.abs(bVec[0]), bVec[1]]
     }
     if(coll[3]){
       console.log('bottom > 0');
-      bVec = [bVec[0], -Math.abs(bVec[1])] 
+      bVec = [bVec[0], -Math.abs(bVec[1])]
     }
-    
-    
+
+
     if($.inArray(true, coll) > -1)
       console.log(bVec);
   }