import time
time.sleep(0.1) # Wait for USB to become ready
print("Hello, Pi Pico!")

from machine import Pin, ADC

butt1 = Pin(18, Pin.IN, Pin.PULL_DOWN)
butt2 = Pin(19, Pin.IN, Pin.PULL_DOWN)

pot = ADC(Pin(26))

leds =[
    Pin(6, Pin.OUT),
    Pin(7, Pin.OUT),
    Pin(8, Pin.OUT),
    Pin(9, Pin.OUT),
    Pin(10, Pin.OUT),
    Pin(11, Pin.OUT),
    Pin(12, Pin.OUT),
    Pin(13, Pin.OUT),
    Pin(14, Pin.OUT),
    Pin(15, Pin.OUT)
] 
i = 0
flag = True
while True:
    leds[i].on()
    pot_value = pot.read_u16()
    time.sleep(0.1 + pot_value/65535)
    leds[i].off()
    
    if butt1.value():
        flag = True
    if butt2.value():
        flag = False

    if flag:
        i += 1
    else:
        i -= 1
    
    if i > 9:
        i=0
    if i < 0:
        i=9