This is a mural on the corner of 40th and MLK that says "Work it out." It portrays many hanging shoes.
The mural was painted by Percy Feils (aka Michael Linton Simpson) and Marcos LaFarga in August, 2014. LaFarga does some pretty recognizable lettering like in the mural. Feils was visiting from New York.
As of April 30, 2015, this has been bombed over.