People in the downtown core were treated to a preview of Northern Lights, an LED art installation created by Douglas Coupland, on the TELUS Sky building on Thursday night. LED lighting, encircling the window frames on the south exterior of the building in the 600 block of Centre Street Southwest, have been programmed to display colourful sequences with countless variations along the 700 square foot surface. The renowned Canadian artist says the project was nearly four-and-a-half years in the making. Coupland admits he knew little about LEDs when he was originally approached to create the sequences but drew inspiration from the northern lights.