If a condition is true for all instances of an object

Looking for an 'elegant' way to write an even such that it is only executed if a certain condition is true for all existing instances of a specific object. Lets say all instances of object 'sprite' has bullet speed 0.

You have the expressions sprite.count and sprite.pickedcount to compare, for this.

First you make a pick by comparisation condition. Expression will be Sprite.Bullet.Speed. Object = that Sprite.

Now it picks all those instances who's bullet speed is zero.

Now you want to know if they all have a zero speed. Just check if they are all picked.

A sub event Compare two values. Value 1 will be Sprite.PickedCount, = , value 2 will be Sprite.Count.