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

Action Reasoning:
The robot is currently on tile_1-1, and the goal is to paint the first row starting with tile_0-0 in an alternating color pattern. Since the robot is not yet at tile_1-0, the best action is to move the robot to tile_1-0. This will position the robot correctly to paint tile_0-0, which is the first step in achieving the goal state. Moving left from tile_1-1 to tile_1-0 is the shortest path to reach the desired position.

New State Description:
Robot1 has moved from tile_1-1 to tile_1-0. Tile_1-1 is now clear, and tile_1-0 is occupied by the robot. The robot is still holding the white paint gun.

Action Chosen:
left(robot1, tile_1-1, tile_1-0)
