Need to animate canvas fill color dynamically

Need to animate canvas fill color dynamically

Hi all,

I need to animate cylinder canvas when I enter 10% in the text box it has fill like pouring milk in glass (Animation).

I have achieved creating cylinder in canvas and fill color but animation is part is not working.

Here is the code for animate ()

function animate() {
requestAnimationFrame(draw);
draw();
}

Here is my Code is avilable in  JSfiddle


Thanks in advance