from machine import Pin, PWM
import time

servo = PWM(Pin(13), freq=50)  # GPIO13 par PWM, 50Hz frequency

def set_angle(angle):
    duty = int((angle / 180) * 102 + 26)  # Angle ko duty cycle me convert karna
    servo.duty(duty)

while True:
    set_angle(0)    # 0° position
    time.sleep(1)
    set_angle(90)   # 90° position
    time.sleep(1)
    set_angle(180)  # 180° position
    time.sleep(1)