HTML5 Canvas, shadowColor & shadowBlur

Question

My question is regarding this shadowBlur feature used on the 2nd (outer) rectangle below. The shadowBlur feature is applied to every shape after this rectangle. (If

Answer 1

    var canvas3=document.getElementById("myCanvas");
    var ctx3=canvas1.getContext("2d");

change canvas1 to canvas3 in the second line. Your ctx3 is actually pointing to canvas1 which i think is wrong.