An other attempt to create as many different grids with simple rules:
Each item in the gird is either a dot a rectangle or a door.

This piece was made in vanilla JS and the rendering is entirely done in CSS. Because of that it is printable in any size you need it to be.

The hand crafted color palettes are named after Tram-Stations in Zürich. Every
mint cycles through 5 out of more then 20 color sets.

Click () -> will yield a new grid and color palette. The combination of blend-modes and general styles stays the same for each buyer.