import board
import pwmio

motor_A1 = pwmio.PWMOut(board.GP17)
motor_A2 = pwmio.PWMOut(board.GP16)
motor_B1 = pwmio.PWMOut(board.GP18)
motor_B2 = pwmio.PWMOut(board.GP19)


def stop():
    motor_A1.duty_cycle = 0
    motor_A2.duty_cycle = 0
    motor_B1.duty_cycle = 0
    motor_B2.duty_cycle = 0