UP = 0
DOWN = UP + 1
LEFT = DOWN + 1
RIGHT = LEFT + 1
NO_OP = RIGHT + 1
ACTIONS = [UP, DOWN, LEFT, RIGHT, NO_OP]
QUIT = NO_OP + 1  # Meta-action
LIST_CONTROLS = QUIT + 1  # Meta-action
ACTION_NAMES = ["ACCELERATE", "BREAK", "LEFT", "RIGHT", "CRUISE"]
