App Profile: Drum accompaniment

Features:
1. Configurable BPM(beats per minute).
2. There are 4 default bit patterns:
- POP/ROCK
- HIP-HOP
- HARD-ROCK
- FUNK
3. You can choose a theme for the drum pads.
4. Can be used by infants and older kids as a toy, because I implemented multi-touch and 99% of clickable elements are drum tiles, so a kid will rarely interrupt the music by a random touch.