Velvet Pressure

Form two separate 16-value velvet blobs in the four pressure chambers. The supply rail holds two blobs: select Left or Right, then tap a chamber column. Equal blobs at the chamber mouth fuse repeatedly. Each blob takes log2(value) vertical spaces, so a 2 takes one, a 4 two, an 8 three and a 16 four. No chamber can exceed four spaces after fusing. Fuse rail combines two equal supplies before loading the next refill, but raises pressure by 2. A chamber drop raises pressure by 1, minus the number of chamber fusions. Pressure 7 bursts the apparatus. Two Vent actions reduce pressure by 2 but consume one of twelve operating beats. The finite refill queue is 4, 4, 8, 8, 4: all 32 units must survive. A spent rail is unavailable. A mismatched chamber can overfill even with only two blobs; read its space count before dropping. Keyboard: Tab and Enter/Space operate buttons; R restarts.