This morning when I was warming up for my lesson with @Goddess Diana I made this short improvisation with just a "C" in the left hand bass note and just one note at a time in the right hand, all in C major, no chord change. I started with a simple rhythm in the bass at first... and I'd make a "call" in the right hand melody and leave time for a "response" - want to try playing a response to my call? Then I dropped the rhythm in the bass and just let it ring, for more of a cadenza-like feel. Want to try that with me?