import machine
from machine import Pin, PWM
from time import sleep

servo = PWM(Pin(15), freq=50)

def set_angle(angle):
    duty = int(((angle / 180) * 2 + 0.5) / 20 * 1023)
    servo.duty(duty)

while True:
#    for angle in range(0, 181, 10):
#        set_angle(angle)
#       sleep(0.03)
        
#    for angle in range(180, -1, -10):
#        set_angle(angle)
 #       sleep(0.03)

        Servo (15,180)
        sleep(1)
        Servo (15,0)
        #sleep(1)