vah7id/drum-randomizer ? reverse-engineered prompt

Build me a web drum machine that makes random experimental beats and lets me play them back in the browser. I want it to use a small library of drum sounds, pick different sounds automatically, and generate 16 step patterns that feel related to each other, like the app is organizing them by style. Show a simple visual map of the sounds and patterns so I can see how they relate while the beat plays.

Please make it easy to swap in my own audio samples later, and keep the app clean and usable even if the AI parts are basic at first. If you need to look up current docs online for the audio or visualization parts, go ahead. I’d also like a way to start and stop playback, adjust tempo, and eventually save or export the result as MIDI or audio if that fits naturally.