Randomize icon

canvas.js

@@ -117,5 +117,6 @@ document.getElementById('randomize').onclick = function(e) {
   randomElement('input[name="bg-color"]').checked = true;
   randomElement('input[name="fg-color"]').checked = true;
   randomElement('input[name="font"]').checked = true;
+  randomElement('input[name="icon"]').checked = true;
   draw();
 }