may I suggest a white pen?

Nothing says “classy joint that wont poison you” like the laziness of using a black marker to scrawl a cheap offer across the windows of a dark, deserted pizzeria. Then just to add the cherry to the top of this pie (which may be just a dog turd with a crust instead of an actual pie) add white pieces of A4 paper behind the black writing to highlight the cracking offer! Nice try lads but suddenly I feel like a pizza hut.