1. Click all bubbles down to a certain size Now you have a regular grid of pixels. Take your favorite monochromatic pixel art of size 2^k x 2^k, and 2. Click

1. Click all bubbles down to a certain size Now you have a regular grid of pixels. Take your favorite monochromatic pixel art of size 2^k x 2^k, and 2. Click on grid locations corresponding to black pixels