JS Canvas Flying Through Space V3

<center>
<body bgcolor="black"/>
<canvas id="canv" width = "1000" height = "1000" style=background:lightgray>
</canvas>

</script>
<body onload="script:
draw();
var rolls=10;
while(rolls!=0){
rolls--;
var Timer1 = setTimeout ('RollSlott();',0.03)
}"/>
<script>
c = document.getElementById("canv");
var ctx = c.getContext("2d");
id = ctx.createImageData(1000,1000);
function draw() {
var w=c.width;
var h=c.height;
window.requestAnimationFrame(draw);
var r;
for (var p = 4 * (w * h - 4); p >= 1; p -= 4) {
r = Math.random();
id.data[p] = id.data[p+1] = id.data[p+2] = 255 * Math.pow(r, 985.6);
id.data[p+3] = 255;
}
ctx.putImageData(id, 0, 0);
}
draw();
</script>
</body>
</html>
</center>