Attempt Number: 4
Error Message: The action and resulting child state have already been explored.

Action Reasoning:
The last action taken was a move to the right, positioning robot1 at tile_1-3. According to the logical conclusions, after a move action, the next step is to change the color of the paint gun. Since the tile directly above (tile_0-3) needs to be painted white to achieve the alternating pattern, robot1 should change its paint color from black to white. This prepares robot1 to paint the tile above it in the next step.

New State Description:
Robot1 is now holding white paint while standing on tile_1-3, ready to paint the tile above (tile_0-3) white.

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