 Complete the following phrase:  His first credited appearance was as the background artist for the Rite of Spring sequence in Fantasia. He worked on Song of the South, Alice in Wonderland, Peter Pan, and Lady and the Tramp. He also went to work on Walt Disneys anthology television series as a background painter and writer in the late 1950s. In the 1950s he became the president of ERA Productions, a small studio which was staffed with animators who had mostly come from Disney after leaving during the 