How to do a 2D smoke effect

How do you do a smokey 2D effect like the one shown in the following video for a loading screen:

https://gyazo.com/d3d358259d244966285aa8abc0cae03c

Looks like a 2d particle emitter, try looking at these, and replacing the textures:

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https://developer.roblox.com/en-us/api-reference/class/Smoke

There’s a class-type specifically for this.

You could make the main menu’s gui slightly transparent and spawn a BasePart in front of the player’s character and parent to it the aforementioned instance (“Smoke” instance).