Tap the bars with your mouse or finger, or play them from your keyboard: the lower two rows map to the two octaves, laid out like a piano. Record a melody, loop it, and export it as a video or GIF.
Turn your recorded melody into a shareable clip. Keep this tab in front while it renders.
Animated GIF plays anywhere but has no sound and a smaller, lower-frame-rate picture. For sound, choose MP4.