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

Action Reasoning:
The last action taken was moving the robot left to tile_1-1. According to the guidelines, after a move action, the next step is to change the color of the paint gun. Since the goal is to paint tile_0-1 white, and the robot is currently holding black, the best action is to change the color from black to white.

New State Description:
Robot1, standing on tile_1-1, has changed its paint gun color from black to white. The robot is now ready to paint the tile above (tile_0-1) with white.

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