One radio inside another radio. Tune its dial or use left and right arrows to separate new worldlines. OPEN or O lifts the case and reveals a clock inside; INNER or I enters it, RETURN or U returns. CUT or X prunes a branch; JOIN or J arms recombination, then touch another clock or RETURN. On the first clock, JOIN and CUT act on its latest branch. Eight clock slots and four nested interiors are available; return, join or cut to make room. Drag BAND continuously between line, plane, parallax, solid, recorded history and hyperspace; D advances a band. Tuning changes the surrounding light and waves as well as the stations. Space receives or pauses. B sends a heartbeat, G changes its logic gate, P arms a patch to another receiver. Tab visits physical controls; brackets select active receivers. Drag a case to push it, darkness to orbit, or wheel to move closer. R records, S stops, W downloads WAV. Save/load preserve branches and settings. M mutes, F reduces motion, Escape returns home. The containing radio displays the computer's local time; inner clocks keep bounded simulated proper time. Rendering adapts to the browser and stops while hidden.