import time
import threading
import fourletterphat as flp


def showbit(pos, num):
    flp.set_digit_raw(pos, num)
    flp.show()

def load(pos, sleep_time):
    curbit = 1

    while True:
        curbit = 1 if curbit > 32 else curbit
        showbit(pos, curbit)
        curbit *= 2
        time.sleep(sleep_time)

def bgload(pos, sleep_time):
    t = threading.Thread(target=load, kwargs={"pos": pos, "sleep_time": sleep_time})
    t.start()
    return t