As you all know for years the pre-August 1948 color WB cartoons were shown with a.a.p. titles at the beginning, but most of you may not know the significance behind the specific elements of the opening logo. The Characters The four characters that appear on-screen when the logo is done zooming out are Bugs, Elmer, Daffy and Porky. During the Leon Schlesinger era (all of which era's color cartoons were in the a.a.p. package), these were the biggest stars in WB cartoons - Bugs and Elmer primarily in the Merrie Melodies series (Elmer originally being known as Egghead), and Daffy and Porky primarily in the Looney Tunes series. The Theme Music The logo's theme music is the 1941 opening rendition of the Merrie Melodies theme, "Merrily We Roll Along". This version was the go-to theme for the Blue Ribbon reissue program, which until 1956 usually cut out the original title cards and credits, and many cartoons in the a.a.p. package were reissued as credit-less Blue Ribbons, usually opening with that rendition of "Merrily We Roll Along". Because of these two uses of the 1941 rendition it has become associated with the a.a.p. package in general.