HTML5 is needed for this!

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// JavaScript Document

var a_canva = document.getElementById("canva");
var contx = a_canva.getContext("2d");
var i = 1;
while (i <= 40) {

    count = i;
    var circ = 302/i;

    while (count >= 1) {

        contx.beginPath();
        contx.arc(circ,302,300/i,0,2*Math.PI);
        contx.strokeStyle="black";
        contx.lineWidth=4/i;
        contx.stroke();

        circ +=(604/i);
        count--;

    }

    i++;

}