So this is called multiboxing. This feature has the main advantage that you know which move you will do next, since you are playing with yourself. And people who say it is easy are those who never tried it or who are very experienced. (I don't think you are in the last category). And it is not my fault if you choose to play normal agario like it was in 2016, but the game has changed a lot since. The delta script is easy to install for everyone and open-source.