from machine import Pin, PWM
from time import sleep

friends=PWM(Pin(2))
friends.freq(50)

def servocycle(position):
    friends.duty_u16(position)
    sleep(0.01)

while True:
    for stat in range(1000,9000,50):
        servocycle(stat)
    for stats in range(9000,1000,-50):
        servocycle(stats)