from time import sleep
from machine import Pin

RL= Pin(2,Pin.OUT)
GL= Pin(1,Pin.OUT)
BL= Pin(0,Pin.OUT)
SR= Pin(28,Pin.IN,Pin.PULL_DOWN)
SG= Pin(27,Pin.IN,Pin.PULL_DOWN)
SB= Pin(18,Pin.IN,Pin.PULL_DOWN)

while True:
    v1=SR.value()
    v2=SB.value()
    v3=SG.value()
    if (v1==1):
        RL.on()
        print("RED LIGHT")
        sleep(0.1)
    elif (v2==1):
        BL.on()
        print("BLUE LIGHT")
        sleep(0.1)
    elif (v3==1):
        GL.on()
        print("GREEN LIGHT")
        sleep(0.1)
    else:
        RL.off()
        GL.off()
        BL.off()
        print("LED OFF")
        sleep(0.1)