import time
from machine import Pin
time.sleep(0.1) # Wait for USB to become ready

BTN1_PIN = 28
BTN2_PIN = 21
BTN3_PIN = 16

BLUE_PIN = 1
GREEN_PIN = 2
RED_PIN = 0

DEBOUNCE_MS = 50

button_1 = Pin(BTN1_PIN, Pin.IN, Pin.PULL_UP)
button_2 = Pin(BTN2_PIN, Pin.IN, Pin.PULL_UP)
button_3 = Pin(BTN3_PIN, Pin.IN, Pin.PULL_UP)

blue = Pin(BLUE_PIN, Pin.OUT)
green = Pin(GREEN_PIN, Pin.OUT)
red = Pin(RED_PIN, Pin.OUT)

buttons = [button_1, button_2, button_3]

#===== code below ============

# button_1 varaible is the red button
# button_2 varaible is the green button
# button_3 varaible is the blue button
# blue, green and red variables represent the leds

# make each led light up when the corresponding button is pressed.  
# Led turns off if the button is not pressed.

while True: