CREASE

Level 01 · Strip. One column, twelve cells, four pins: the mirror with nothing else on screen.

1. 01Tap any crease line. The shorter side folds over onto the longer one.
2. 02Pins mirror across the crease. Two pins may never land in the same cell.
3. 03Fold until the sheet is as small as the pins allow: area down to the pin count.