move()walk one square in the direction the robot is facing turn_left()turn 90 degrees left (also turn_right) wall_ahead()True if a wall is directly in front (also wall_left, wall_right) at_exit()True if the robot is standing on the exit facing()"north", "east", "south" or "west" pos()the robot's position as (x, y) say("hi")the robot says something print("hi")write to the console