When 64 year old retiree, Huseyin Cetinel, repainted the ugly concrete of the Findikli Stairs in central Istanbul in rainbow hues, he was not intending to start a revolution. He just wanted "to make people smile." But when the city repainted the steps to their original dull gray, things got interesting. Istanbul is famously activist when it comes to high-handed government appropriations of public space. Taking to social media, guerillas of color quickly transformed public passageways throughout Istanbul -- and around Turkey -- into places of joy.