import machine 
import time 
freq=15000

motor_in1 = machine.Pin(4,machine.Pin.OUT)
motor_in2 = machine.Pin(5,machine.Pin.OUT)
pwm = machine.PWM(machine.Pin(14),freq)

def set_motor(speed,direction):
    if direction==1:
        motor_in.value(1)
        motor_in2.value(0)
    else:
        motor_in1.value(0)
        motor_in2.value(1)
        pwm.duty(speed)
while True:
    set_motor(1023,1)
    time.sleep(3)
    set_motor(0,0)
    time.sleep(1)
    set_motor(900,0)
    time.sleep(5)
    set_motor(0,0)
    time.sleep(1)