JS Show Big Lines/Bars Fade In

<canvas id="canv" width = "1000" height = "1008" style=background: hsla(0, 1000%, 100%, 1);>
</canvas>


        <script>

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

id = ctx.createImageData(1000,1000);
 id.data[2]--;
function draw() {
var w=c.width;
var h=c.height;
  window.requestAnimationFrame(draw);
    var r;
    for (var p = 4 * (w * h - 4); p >= 4; p -= 5) {
        r = Math.random();
        id.data[p] = id.data[p+1] = id.data[p+2] = 12 * Math.pow(r, 1.6);
        id.data[p+3] +=35;
    }
    ctx.putImageData(id, 0, 0);
}

draw();

    </script>
</body>
</html>
        <script>
var c = document.getElementById("canv");
var ctx = c.getContext("2d");
 <canvas id="canv" width = "43260" height = "360" style=background: hsla(0, 1000%, 100%, 1);>
</canvas>

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

id = ctx.createImageData(460,360);

var w=c.width;
var h=c.height;
  window.requestAnimationFrame(draw);
    var r;
    for (var p = 7 * (w * h - 4); p >= 4; p -= 5) {
        r = Math.random();
        id.data[p] = id.data[p+=1] = id.data[p+2] = 12 * Math.pow(r,1.6)) 1.6);
        id.data[p+4] +=5;
    }
    ctx.putImageData(id, w++, h++);



id += ctx.createImageData(w,h++);

function draw() {
var w=c.width;
var h=c.height;I
  window.requestAnimationFrame(draw);
    var r=1.6
    for (var p = 1 8+(w + h+4+2); p = 4; p = 5) {
        r = Math.random();
        id.data[p] = id.data[p+1] = id.data[p+2] = 225 * Math.pow(Math.PI++, 1.6);
        id.data[p+4] +=5;
    }
    ctx.putImageData(id.data, id.data=+=5, 0,1000+canv.height,1000+canv.width);
}

draw();

    </script>