if (persistent.index === undefined) {
persistent.index = 0;
}
context.fillStyle = "rgba(0,0,0,0.02)";
context.fillRect(0, 0, 32, 32);
if (persistent.index % 5 === 0) {
context.fillStyle = "#00DDFF";
context.fillRect(Math.floor(Math.random() * 16) * 2, Math.floor(Math.random() * 16) * 2, 2, 2);
}
persistent.index = persistent.index + 1;
