from machine import Pin
import time

btn1 = Pin(14, Pin.IN, Pin.PULL_UP)
btn2 = Pin(12, Pin.IN, Pin.PULL_UP)
btn3 = Pin(13, Pin.IN, Pin.PULL_UP)
led1 = Pin(15, Pin.OUT)
led2 = Pin(2, Pin.OUT)
led3 = Pin(4, Pin.OUT)
led4 = Pin(5, Pin.OUT)

leda = [led1, led2, led3, led4]
ledb = [led4, led3, led2, led1]

while True:
    if btn1.value() == 0:
        for i in leda:
            i.on()
        for i in leda:
            i.off()

    if btn2.value() == 0:
        for i in range(4):
            leda[i].on()
            time.sleep(0.5)
        for i in leda:
            i.off()
        time.sleep(0.5)

    if btn3.value() == 0:
        for i in ledb:
            i.on()
        time.sleep(0.5)
        for i in range(4):
            ledb[i].off()
            time.sleep(0.5)