3x39 - Mr. Bean: The Animated Series

Because he is out of actual paint, Mr. Bean decides to paint using various condiments such as ketchup, mustard, cabbage juice, blueberries and moldy cheese but the flies won't leave it alone because they like it. He sells it for £5 until he hatches a scheme of getting their money without returning it to the panicked customers after they escape from the flies and drop the painting.