-

async def ad_roll():
    adnum = 0
    while 1:
        async with aiofiles.open('keys.json', 'r') as k:
            interval = json.loads(await k.read())['interval']
        async with aiofiles.open('ads.json', 'r') as a:
            ad = json.loads(await a.read())['ads']
        if adnum > len(ad):
            adnum = 0
        else:
            pass
        await bot.sendMessage(-1001132937659, ad[adnum])
        dt = datetime.now() + timedelta(minutes=int(interval))
        adnum += 1
        while datetime.now() < dt:
            await asyncio.sleep(1)