Mr. Bean S03E05 - Artful Bean

Because he does not have any actual paint, Mr. Bean decides to create makeshift paint using various condiments such as ketchup, mustard, cabbage juice, blueberries and mouldy cheese, but the flies would not move away from it 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.