Once upon a time I wrote this random pizza generator that listens to #bitcoin transactions and uses txn hashes for entropy. I don't know if it still works, but it could probably be easily modified to listen to local node zmq instead of blockchain-info's websocket.

GitHub
GitHub - Shadouts/random-bitcoin-pizzas: Bitcoin transactions generate random pizzas.
Bitcoin transactions generate random pizzas. Contribute to Shadouts/random-bitcoin-pizzas development by creating an account on GitHub.