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

Action Reasoning:
The current position of robot1 is at tile_1-3, holding a white paint gun. Our goal is to paint the tiles in row 0 in an alternating color pattern starting with black at tile_0-0. Since the robot is not at the target column (tile_1-0) to paint tile_0-0, the best next action is to move the robot towards tile_1-0. Currently, the robot is at tile_1-3, so moving it left to tile_1-2 is a step in the right direction. This action has not been explored yet, avoiding redundancy.

New State Description:
Robot1 is now at tile_1-2, holding the white paint gun. Tile_1-3 is clear, and tile_1-2 is occupied by the robot.

Action Chosen:
left(robot1, tile_1-3, tile_1-2)
