TRTL Font

In downtown Detroit there are a lot of empty, abandoned buildings. On many
you can find one or two graffiti turtles spray painted on them. They are usually
accompanied by the word "turtle" spelled in a variety of interesting ways:
TRTL, Turdl, trdl, etc. I have heard that this is done to the abandoned
buildings in protest to the glacial pace at which the city of Detroit is being
"revitalized".

The idea for this font came from the "TRTL" lettering in the windows of one
such abandoned building. The messages were written one letter per window and
said things like "NO WAR" and "NO RACISM" and, of course, "TRTL".