This is a quick mass ejector for Agario. Hold the 'W' key to rapidly spit out mass.
This script is better than others because it stops and starts when you do.

Press 'A' for double-split.
Press 'A' and spacebar for triple-split.
Press 'D' for quadruple-split. (For use in trick-splits) (You'll be in 16 pieces)

Keeping mouse still and pressing 'S' will stop your cell when you have one piece.