from machine import Pin,Timer
import utime

leds=[Pin(i+2,Pin.OUT) for i in range (9)]
up=Pin(28,Pin.IN,Pin.PULL_UP)
down=Pin(27,Pin.IN,Pin.PULL_UP)
tog=Pin(26,Pin.IN,Pin.PULL_UP)
for led in leds:
    led.low()
upper=[0,1,2,3,4,6]
lower=[2,4,5,6,7,8]
def fn(timer):
    for led in leds:
        led.low()
    if up.value()==0:
        for i in upper:
            leds[i].high()
    elif down.value()==0:
        for i in lower:
            leds[i].high()
    else:
        while tog.value()==0:
            for i in upper:
                leds[i].high()
            utime.sleep(1)
            for i in upper:
                leds[i].low()
            for i in lower:
                leds[i].high()
            utime.sleep(1)
            for i in lower:
                leds[i].low()
t = Timer(period=300,mode=Timer.PERIODIC,callback=fn)