ORLANDO (AP) — There’s no running or sweating in this Orlando marathon, but participants say it’s very grueling.

Two artists competed in a 20-hour painting competition that ended early Sunday morning.

The winner will be determined by whichever piece sells for the most amount of money. Bidding started at $25 and will continue until midnight Sunday.

The artist Swamburger said he’s never finished a 3-foot by 4-foot work in such a short amount of time. The Orlando Sentinel reports he came up with the idea for the competition and hopes it will draw attention to the local art scene. His real name is Asaan Brooks.

His challenger, 30-year-old SKIP, is known for pieces that feature a bright-colored, spray-painted orange with the words “Sunshine State of Mind.” His real name is Justin Skipper.