Garbed in black and Relay for Life’s signature purple, Lynn Stepp seemed to dress like the antagonist of “The Wizard of Oz,” but she thought otherwise. “They call me the Evil Witch of the West, but I think of myself as the Sweet Witch of the South,” said Stepp, who serves as the survivor chairwoman. Stepp, a 22-year cancer survivor, and others kicked off the new year of Relay for Life as characters from children’s novels Tuesday evening at Scott’s Downtown in Gainesville.