Stephen Powers, an artist from Philadelphia, decided to paint the walls of the city with loving words. To do so, he created a site, www.aloveletterforyou.com and asked people to send phrases. Fifty of those phrases were painted by 40 volunteers, between artists and city dwellers, who learned the technique in workshops taught by him. Then, he chose to paint the walls that were in the route of an old railway line that passes through the city. The project will also become a documentary and a book.