This user just copy/pastes other people's scripts and posts them here, pretending they wrote them.
Its pretty evident based on how they post stuff.
"This is A clan plugin"
WOW, super descriptive resource yeah?
Also, not a plugin.

I have reported several of these to spigot staff, which got removed. Unfortunately I cannot find the original source of this resource so I cant report it.
But its very clear you didn't write this yourself.

Which Librarys are needed for it?

please describe it :)

it looks very nice this Script :)