Think of freeway overpasses. Think of the chain link fences along these overpasses. Think of the holes as pixels. Think of styrofoam cups as pixels turned on.
Think IMPEACH BUSH written in styrofoam cups on that chain link fence.
I am off to catch a flight to a conference, or I would go back and get a picture to post. Perhaps another Phoenix Kossack can get it. Drive east bound on I-10 from 19th Ave to 7th Ave. Just before you get to the deck park tunnel.
It is a neat way to do the sign. Grab a sheet of graph paper, plot it. Get 5 friends and you can put it up in less than 60 seconds.