Gerver's Sofa (Approximation)
Corridor: - Top hallway: 0 ≤ x ≤ 600, 0 ≤ y ≤ 100
- Side hallway: from (600,0) downward
Sofa travels along center line (y=50) further before turning.
Starts turning 50px later than before.

Red line = centroid path.
Faint curves = previously occupied sofa boundary.
Only centroid shown at current position.
Click "Play" to restart animation.