The image of a runner is visible on the Saleforce Tower crown as part of a light sculpture created by famed light artist Jim Campbell in San Francisco, Calif., on Thursday, April 26, 2018. Campbell is installing the tallest piece of public art on earth, a light sculpture on the top 9 stories of Salesforce Tower downtown. Photo: Carlos Avila Gonzalez / The Chronicle
Electronic artist Jim Campbell sat in Blooms Saloon on Potrero Hill, looking out the window and across town at Salesforce Tower. As day turned to dusk, he pressed a button on his laptop and the top 130 feet of the tower came ablaze in yellow LED light. Then the dark figure of a ballerina came dancing across the yellow light 61 stories up, and one of the world's highest works of public art was alive for the first time.
