Each of the four waits, unseen, while the record before it holds a villain still on its way (144-151), so they go one at a time. Then it moves across, at most four a turn, to four to the right of the pit's front picture (record 9's x), and then sinks four a turn until its y is below 48, when it is gone and its record emptied. It swaps between its two frames every turn, and is drawn in its own colour -- red, magenta, green and cyan for the villains of 96, 100, 104 and 108 -- with a rising sound (ENDING_BEEP) all the while it moves.