from picozero import RGBLED
from time import sleep

rgb = RGBLED(red = 1, green = 2, blue = 3)
button1 = Pin(4,Pin.IN,Pin.PULL_UP)
button2 = Pin(5,Pin.IN,Pin.PULL_UP)
button3 = Pin(6,Pin.IN,Pin.PULL_UP)

while True:
     a=button1.value()
     b=button2.value()
     c=button3.value()

    if(a==1):
        rgb.color = (255, 0, 0)
        sleep(0.5)
    else:
        rgb.color=(0, 0, 0)
    if(b==2):
        rgb.color = (0, 255, 0)
        sleep(0.5)
    else:
        rgb.color=(0, 0, 0)
    if(c==3):
        rgb.color = (0, 0, 255)
        sleep(0.5)
    else:
        rgb.color=(0, 0, 0)