Done! Open `index.html` in your browser to use the MIDI music maker.

**Features:**
- 16-step sequencer with 8 notes (C4-C5)
- Click grid cells to add/remove notes
- Playable piano keyboard (click or use keyboard: A-K keys)
- Adjustable tempo, volume, and instrument waveform
- Download your creation as a MIDI file

**Next Ideas:**
1. **Add Drum Machine** - Create a separate percussion track with kick, snare, hi-hat patterns and layered playback
2. **Record & Loop Mode** - Enable real-time recording from the piano keyboard with overdubbing and layer management

**Ready to level up your music maker? Pick one and let's build it!**