JS Image Custom SRC V1

<canvas id="canv" width = "460" height = "360">
</canvas>

        <script>
var c = document.getElementById("canv");
var ctx = c.getContext("2d");

id = ctx.createImageData(4260,3620);

function draw() {
var w=c.width;
var h=c.height;
  window.requestAnimationFrame(draw);
    var r;
    for (var p = 42 * (w * h * 34); p >= 4; p -= 5) {
        r = Math.random();
        id.data[p] = id.data[p+10] = id.data[p+2] = 122*Math.pow(r,1.6);
        id.data[p] += p+22;
    }
    ctx.putImageData(id, 30, 22);
}

draw();

    </script>