from machine import Pin
from time import sleep

swtR=Pin(1,Pin.IN,pin.PULL_DOWN)
swtG=Pin(2,Pin.IN,pin.PULL_DOWN)
swtB=Pin(3,Pin.IN,pin.PULL_DOWN)
red=Pin(20,Pin.OUT)
green=Pin(19,Pin.OUT)
blue=Pin(18,Pin.OUT)

while True:
    v1=swtR.value()
    v2=swtG.value()
    v3=swtB.value()