2018.4.40

def brake(duration, l_m, r_m):
    l_m.ChangeDutyCycle(0)
    GPIO.output(AIN2, False)
    GPIO.output(AIN1, False)

    r_m.ChangeDutyCycle(0)
    GPIO.output(BIN2, False)
    GPIO.output(BIN1, False)

    time.sleep(duration)