A technical patent drawing for interlocking building bricks fills this composition, rendered in white line work against a charcoal black background that mimics a chalkboard. The schematic shows multiple isometric views and cross-sectional diagrams of brick mechanisms stacked vertically, capturing the precise engineering behind a ubiquitous toy with clinical clarity and vintage documentation style. Water-resistant polyester, hookless and cut extra long to fit any bath, machine washable and made to order. It turns the bathroom wall into the room's best feature.