from machine import Pin, ADC
from time import sleep

coluna = {
  1: Pin(18, Pin.PULL_UP),
  2: Pin(5, Pin.PULL_UP),
  3: Pin(17, Pin.PULL_UP),
  4: Pin(16, Pin.PULL_UP)
}

linha = {
  1: Pin(23, Pin.PULL_UP),
  2: Pin(22, Pin.PULL_UP),
  3: Pin(21, Pin.PULL_UP),
  4: Pin(19, Pin.PULL_UP)
}

numeros = [
  ("1")
]

pot = ADC(Pin(34))
pot_anterior = 0
t = 0

while True:
    for i in coluna:
        coluna[i].on()
        if linha[b] == True:
          print()
        sleep(pot.read()/4095)
        coluna[i].off()