Attempt Number: 4
Error Message: The action change-color(robot1, white, black) has already been explored.

Action Reasoning:
The last action taken was a move (right) to tile_1-2. According to the guidelines, after a move, the next action should be to change the color of the paint gun. Since the robot is currently holding white and the target tile_0-2 should be painted black, the best action is to change the color from white to black.

New State Description:
Robot1 is now holding the black paint gun while standing on tile_1-2.

Action Chosen:
change-color(robot1, white, black)
