from machine import Pin,ADC,PWM
import time
pwm=PWM(Pin(0))
pwm.freq(50)
adc=ADC(Pin(26))
def servo(position):
    pwm.duty_u16(position)
    time.sleep(0.1)
while True:
    pos=(adc.read_u16()*8000)//65535+1000
    servo(pos)
    '''for pos in range(1000,9000,50):
        servo(pos)
    for pos in range(9000,1000,-50):
        servo(pos)
        
        
        adc=0-65535
        pos=1000-9000'''