Hii there.

I'm searching for a tutorial to get this kind of effect: Made by __iiicons.
I want to know how to get the little swirly lines, and I went through the memories and past entries but I couldn't seem to find a tutorial for it but I'm pretty sure there is one.
Could anyone point me in the direction of one please?
I'd really appreciate it ♥

Here's another example:

Thanks to anyone that can help me!