Current State ID: 14
Current State Description: Robot1 is still on tile_1-4, but it has changed its paint gun color from white to black.

Child State ID: 21
Action Taken: left(robot1, tile_1-4, tile_1-3)
State Description: Robot1 has moved from tile_1-4 to tile_1-3, still holding a black paint gun. Tile_1-4 is now clear, and tile_1-3 is occupied by Robot1.

Child State ID: 22
Action Taken: down(robot1, tile_1-4, tile_2-4)
State Description: Robot1 is now on tile_2-4, holding black paint. Tile_1-4 is clear, and tile_2-4 is occupied by Robot1.

