Use the arp and progression method with a custom clip. The riff at 6:25 in the following track uses this technique:
Using basic music theory, Scribbletune can be used to generate arpeggiated chord progressions that always sound good!
Generate classic breakbeats with slight variations each time
Create a starting point for an instant drum loop with a bassline
Use the clip method with wav samples to create a looping beat (desktop browser only)
Use music constraints to create a very simple melody
Use Scribbletune with frameworks such as React to create UI applications specifically for music