This sketch, titled Draw, consists of a canvas of either dots whose radius changes based on a random perlin noise seed or a grid of squares whose opacity changes based on the same noise pattern.
The user can toggle between the two diplay modes by hitting the magenta buttons labeled "Circles" or "Squares". The yellow buttons control the brush type produced when the user interacts with the canvas.
The slider at the bottom controls the resolution of the noise. Towards the left is zoomed in and towards the right is zoomed out.