from time import sleep
sleep(0.1) 

from machine import Pin, ADC, PWM

poton_1 = ADC(Pin(27))
poton_2 = ADC(Pin(26))
poton_3 = ADC(Pin(28))

red = PWM(Pin(19))
green = PWM(Pin(18))
blue = PWM(Pin(21))

red.freq(1000)
green.freq(1000)
blue.freq(1000)

while True:
  sleep(0.5)
  poton_1_value = poton_1.read_u16()
  poton_2_value = poton_2.read_u16()
  poton_3_value = poton_3.read_u16()
  red.duty_u16(poton_3_value)
  green.duty_u16(poton_2_value)
  blue.duty_u16(poton_1_value)