game javascript test canvas html

<!DOCTYPE html>
<html>
<body>

<canvas id="myCanvas" width="600" height="600">
Your browser does not support the HTML5 canvas tag.</canvas>

<script>

var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
function draw() {
var x = 10;
var y = 10;
ctx.clearRect(0, 0, 600, 600);
ctx.fillRect(x, y, 20, 20);
document.addEventListener
}
setInterval(draw, 60);
</script>
</body>
</html>