from machine import Pin,PWM
from time import sleep
servo = PWM(Pin(13), freq = 50)
pushinc = Pin(12,Pin.IN,Pin.PULL_UP)
pushdec = Pin(14,Pin.IN,Pin.PULL_UP)
i=25
while(1):
servo.duty(i)
if (pushinc.value() == 0 and i<=105):
servo.duty(i)
sleep(0.1)
i=i+10
if (pushdec.value() == 0 and i>=45):
servo.duty(i)
sleep(0.1)
i=i-10