# PWM control of a servo motor without any external libraries

from machine import Pin
from time import sleep_us

servo=Pin(0,Pin.OUT)
pulseWidth=1000

while True:
  #create a small high pulse followed by a longer low signal with a total period of 20ms
  servo.on()
  sleep_us(pulseWidth)
  servo.off()
  sleep_us(20000-pulseWidth)
  
  print(pulseWidth)
  pulseWidth=pulseWidth+1;  #change the increment to change the speed of the servo

  if pulseWidth>2000:
    pulseWidth=1000