Sure man.
Well, basically I had just 1 place holder enemy ship in the prototype.
Very simple code for the ships firing bullets.
Every x seconds, pick a random instance of that sprite and create an object/sprite (bullet).
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Now, it isn't just one enemy ship.
I have many different types of enemy ships.
I want to replicate the original frequency/look of bullet spawning.
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If I do the same code for each different enemy ship sprite now, the frequency of bullet/shot spawning is way off because it picks a random instance of a sub-group (not the group of many different sprites).
every x seconds, pick a random instance of Sprite A, and create bullet.
every x seconds, pick a random instance of Sprite B, and create bullet.
If you introduce just 1 extra sprite enemy ship sprite, the frequency of bullet spawning is completely different vs:
every x seconds, pick a random instance of Sprite A, and create bullet.