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 from tile_1-1 to tile_1-2). According to the logical conclusions, after a move, the next action should be to change the color of the paint gun. Currently, Robot1 is holding the white paint gun, and the next tile to be painted above (tile_0-2) should be black according to the goal state's alternating pattern. Therefore, the best action is to change the paint gun color from white to black.

New State Description:
Robot1, located on tile_1-2, has changed its paint gun color from white to black.

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