from machine import ADC, Pin
from time import sleep
led1= Pin(1, Pin.OUT) # this is the built-in LED on the Pico
led2= Pin(2, Pin.OUT)
led3= Pin(3, Pin.OUT)
led4= Pin(4, Pin.OUT)
pot = ADC(Pin(26)) # ADC0 is GPIO 26.  Connect to row 10 the right side


while 1:

    pot_value = pot.read_u16() # read the value from the pot
    flash_delay = pot_value/65535
    volt=pot_value/65535*3.300
    print ("voltage:", volt)
    print("pot_value:",pot_value)
    led1.on()
    led2.on()
    led3.on()
    led4.on()
    sleep(flash_delay)
    led1.off()
    led2.off()
    led3.off()
    led4.off()
    sleep(flash_delay)