Two painters and two easels

I visited a colleague today and we had a workshop that was really cool. We used the same main colors and one canvas on each easel and placed them back to back so none of us could se what the other one was painting. Then we took turn to paint" first" telling the other what was created on the canvas by telling it in adjectives and metaphors. And so we changed and it was the other one´s turn to lead and tell.