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

Action Reasoning:
The robot is currently at tile_1-0, holding the white paint gun. The goal is to paint tile_0-0 black as it is the first tile in the alternating pattern. According to the logical conclusions, if the color of the paint gun is different from the target color of the tile above, the robot should change the color of the paint gun. Since the robot currently holds white paint and tile_0-0 needs to be painted black, the robot should change its paint gun color to black.

New State Description:
Robot1 is still at tile_1-0, now holding the black paint gun. The tile_1-0 remains occupied by the robot, and tile_1-1 is clear. The robot is ready to paint the tile directly above it with black paint.

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