Animation délay after exécution

Hello, to simplify the animation synchronization procedures, it should be possible to program an animation with 3 input fields: The delay before activation, the duration of execution, and a delay of inactivity after execution. Indeed, for the moment it is very difficult to create an animation whose synchronization with another is shifted by a certain time; the 2 animations get out of sync after the first loop. The idle time field after execution is sorely lacking in many cases