Kelly's work has been some of my favorite over the last couple years. I'd suggest hitting your favorite googles to see more. As sad as this is, 92 years creating is one hell of a life lived. I remember chasing a building he painted and added a sculpture to in LA two summers ago. I waited an hour for a truck to leave just to get a clear photo of it.

There's all these great and detailed things you can read about Ellsworth's prolific life and career. Here's a couple of my favorite:

New York Times  
Artspace Q&A