Opensea BOT

I would like to have a simple bot that connects to opensea.io and makes a bid on every single item of a collection for a price that i specify and expiration date that i specify. This is a gas free operation

the bot should also be able to make a purchase, if an item of a collection or a specific item gets offered under a specific price. It should be monitoring many items and be fast in grabbing the offer before it gets sold. Gas should be taken into consideration, ideally basing a calculation from the numbers taken from https://etherscan.io/gastracker