{
const width = 600,
height = 300,
maxR = 50;
const ctx = DOM.context2d(width, height);
for (let i = 0; i < 20; i++) {
const x = Math.random() * width,
y = Math.random() * height,
r = Math.random() * maxR;
ctx.moveTo(x + r, y);
ctx.arc(x, y, r, 0, 2 * Math.PI);
ctx.stroke();
}
return ctx.canvas;
}