diff --git a/Chapter 13/bouncing ball b/Chapter 13/bouncing ball
deleted file mode 100644
index 546f857..0000000
--- a/Chapter 13/bouncing ball	
+++ /dev/null
@@ -1,46 +0,0 @@
-<!doctype html>
-<html>
-
-<head>
-    <title>Canvas HTML5</title>
-    <style>
-        #canvas {
-            border: 1px solid black;
-        }
-    </style>
-</head>
-
-<body>
-<div><canvas id="canvas"></canvas></div>
-<script>
-const canvas = document.getElementById("canvas");
-const ctx = canvas.getContext("2d");
-const ballSize = 10;
-let x = canvas.width/2;
-let y = canvas.height/2;
-let dirX = 1;
-let dirY = 1;
-function drawBall() {
-    ctx.beginPath();
-    ctx.arc(x, y, ballSize, 0, Math.PI*2);
-    ctx.fillStyle = "red";
-    ctx.fill();
-    ctx.closePath();
-}
-function move() {
-    ctx.clearRect(0, 0, canvas.width, canvas.height);
-    drawBall();
-    if(x  > canvas.width-ballSize || x  < ballSize) {
-        dirX *= -1;
-    }
-    if(y > canvas.height-ballSize || y < ballSize) {
-        dirY *= -1;
-    }
-    x += dirX;
-    y += dirY;
-}
-setInterval(move, 10);
-    </script>
-</body>
-
-</html>
