Antonio Perez / Chicago Tribune
December 10, 2013
A jogger runs across as letters spell out Thanks Chris on the south face of the Blue Cross Blue Shield building, Tuesday, Dec. 10, 2013, done in honor of electrician Chris Gillott, who originated the tradition of lit window messages in the Blue Cross Blue Shield building. Volunteers opened and closed the blinds on the south facing wall of the Blue Cross Blue Shield building in a specific pattern to create the message "Thanks Chris", Tuesday, Dec. 10, 2013. Approx. 10 volunteers made up of electricians, carpenters and others helped spell out the words.