All 3×3 figure doors
A 3×3 door has nine cells. Fill some, leave the rest empty, and you get one of 512 figures. This project is about building a piston door for each of them.
A door closes into its figure: 101 111 101 is an H, for example.
Finished doors move to one showcase plot on synergyserver.net, all 512 side by side. Anyone on the server can join in: pick a free figure and build its door. Who builds what is tracked in the sheet and at the reference plot: /warp tp figure