Transient Abstract Bubble Machine
6 mellow Backgrounds of various rarity, then white being rare, black being super rare.
Mostly Circles, sometimes Squares or the rarest: Curved Squares.
Rarely, there will also be lines.
Very rarely the bold sub-palette will feature reds or greens, instead of the common blue and yellow.
There are numerous other traits of varying scarcity but those remain undocumented :)
Enjoy.