Photo of Strabane IRA graffiti edit a hit on Twitter 16 September 2013 Last updated at 12:42 An edit to graffiti on a wall in County Tyrone has become a Twitter hit. The graffiti, which was sprayed on a small building in Strabane, originally said 'Join the IRA'. An unknown person with a spray can changed it to 'Join the library.' A photograph of the edited graffiti was tweeted by teacher and writer Brian McGilloway. Hollywood actor Minnie Driver was one of the many people who retweeted the picture. Super-positive "It's the message of the year in my perspective and the picture has caused a lot of interest locally and further afield," said Mr McGilloway. It's quirky and it's a rather positive message. It would be interesting to see if it was young people behind it. I don't know who is behind it at this stage but whoever is behind the edit is a genius. A number of people responded to Mr McGilloway's tweet saying "cracker," "brilliant," "we need more of this." One enthusiast tweeted: "That's outstanding. Super-positive way to start a week. Well caught, sir.