Is there a way to run some code module (eventsheet or javascript) only when needed?

I will explain my situation in detail:

my game is multiplayer (4 players per game), and I would like each player to be able to choose their own "skin".

However, there will be skins that I will be able to make via sprite animation, and others that I want to use construct resources to animate.

Is there any way to run each animation one by one in each eventsheet or js script?