from machine import Pin,ADC,PWM
import time

Pwms = [PWM(Pin(19)),PWM(Pin(21)),PWM(Pin(22))]

adcs = [ADC(Pin(2)),ADC(Pin(0)),ADC(Pin(4))]

while True:
    for pwm in Pwms:
        pwm.freq(5000)
    adc_one_pot = adcs[0].read() # first potentiometer   
    adc_two_pot = adcs[1].read() # second potentiometer
    adc_three_pot = adcs[2].read() # third potentiometer

    duty_led1_cycle = adc_one_pot // 4
    duty_led2_cycle = adc_two_pot // 4
    duty_led3_cycle = adc_three_pot // 4
    
    Pwms[0].duty(duty_led1_cycle)
    Pwms[1].duty(duty_led2_cycle)
    Pwms[2].duty(duty_led3_cycle)

    time.sleep(0.5)