Crack Button

a Save button made of glass. every press cracks it from the point it was hit, the cracks accumulate, and the eleventh takes the face apart.

key insight: a crack stops where it meets an older crack. a fracture cannot cross a free surface, so real broken glass is one connected web of T-junctions and never a pile of independent stars laid over each other. every walk is truncated at its first intersection with anything already open.

the break is a partition of the face rather than a pile of shapes: each shard is the wedge between two walks out of the last impact, so an edge is one walk shared by the two shards either side and no gap can open between them. the clip goes inside the thing that moves, or the pill becomes a window the pieces slide out of and vanish at.