Reached through UPDATES: the first part of the re-programming (SCENE_TOOL). Every eighth turn the sparks change colour, bright yellow or black by bit 3 of the turn counter, with a beep; after sixteen changes they go (graphic 1: rubbed out and emptied) and set SCENE_STATE to 1, which lets the tools swing.

COLOUR_SCENE_OBJECT is the update routine of the scene's pieces that do not move (graphics 85, 88 to 91: the can of oil, the robot's stand, its legs and top) and the last step of the others'. The scene's screen is bright red on black (GAME_ENDED), the colour of its frame, and each piece has its own colour: this paints the attribute cells a piece's picture covers (its width and height as last drawn, at its pixel place) with its colour at +10, bottom row first -- except any cell already bright green ($44), the hammer's colour, so the hammer stays green where it is over the robot. Nothing puts those cells back, so the robot's head is left green after the hammer's blows (seen in the simulator). It does nothing for a piece not drawn yet.