You will need to install a user script manager extension to install this script.
*Don't install if you have Legend Mod
***AgarioScripts is a much lighter Script Manager, compatible with all user.js APIs that provides better performace (more FPS), because it doesnt interfere with 3rd party websites. Remove Tampermonkey if used. Greasefork does not calculate installs from AgarioScript as Daily Installs
****Jimboy3100's Agario Github Library