JS Earthquake Shake Animation SRC

<!DOCTYPE html>
<html>
<style>
#animate {
width: 80px;
height: 80px;
position: absolute;
background-color: red;
}
</style>
<body bgcolor="#000000">
<p>
<center>
<button onclick="myMove()">Start Animation</button>
</center>
</p>
<div id ="container">
<div id ="animate"></div>
</div>
<script>
function myMove() {
var elem = document.getElementById("animate");
var pos = Math.random()*5;
var id = setInterval(frame, 50);
function frame() {
if (pos >= 600) {
pos=0;
pos++;
elem.style.left = Math.ranodom()*pos + 'px';
} else {
pos++;
elem.style.left = Math.random()*pos + 'px';
}
}
}
</script>
</body>
</html>