Though relatively short, the history of animation up until now is relatively complex. When animations were first created in the early 1900’s, animators had to hand draw 24 frames, entire scenes, in order to produce a single second of animation. In order to refrain from drawing entire scenes, cel technology was used. Cels, clear acetate sheets, would have line drawings either drawn or photocopied on them and artists would fill in color as necessary. While individual frames would technically have to be drawn out, it was not necessary to draw the entirety of the scene. By overlaying different cels, cel technology expedited the animation process as animators could draw a background or object once, and use it for the entirety of an animated sequence. Only moving objects in the scene would need to be drawn anew. Examples of such animations include Disney’s Snow White and Sleeping Beauty. Disney’s last cel animated work had been The Little Mermaid.