color_squares.py

import asyncio
import aiohttp

BASE_URL = 'https://josephg.com/sp/edit'
HEADERS = {
    'Origin': 'https://josephg.com',
    'User-Agent': ('Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) '
                   'AppleWebKit/537.36 (KHTML, like Gecko) '
                   'Chrome/57.0.2987.133 Mobile Safari/537.36'),
    'Referer': 'https://josephg.com/sp/',
}


async def color_square(x, y, color, session):
    async with session.post(
            BASE_URL, headers=HEADERS,
            params={'x': x, 'y': y, 'c': color}) as resp:
        status_code = resp.status
        success = 'SUCCESS' if status_code == 200 else 'FAILED'
        print(f'{success} colored square @ ({x}, {y}) with color {color}')


async def main(coords, color):
    async with aiohttp.ClientSession() as session:
        coros = [color_square(x, y, color, session) for x, y in coords]
        await asyncio.wait(coros)

loop = asyncio.get_event_loop()
coords = [(x, y) for x, y in zip(range(20, 40), range(0, 30))]
loop.run_until_complete(main(coords, 0))