Make a rap with loops!
Tap anywhere on the canvas to start. The water surface shows the audio waveform, the bubbles show each track's spectrogram.
Tap on any of the 4 fish, it will turn orange when selected. On the next loop, a white waveform will appear from the sound of the mic, and the fish will eat the sound. From the next loop, the fish will play back the sound.
Tap the area above the water (at the top of the canvas) to stop at the end of the loop.

Microphone required for recording.
Due to lack of support for the MediaRecorder API, recording will not work on iOS/Safari/Edge. It works on Android/Chrome/Firefox.