World Border Escape

Plugin category:
Idk what to put here.

Minecraft version:
1.11 - 1.8

Suggested name:
World Border Escape

What I want:
- So when someone is mining in a cave in a UHC for example, and they get killed by the border it can be really frustrating, so I'd like that when the vanilla world border passes a player by 2 blocks it teleports them to the surface 10 blocks inside it but around the same X and Z coordinates and in case there is lava put them in a safe place.
- I'd want it so those 2 and 10 blocks are able to be customized and I can choose wich blocks can the players be teleported to, for example: if they can be teleported to grass, stone, dirt, sand, etc.

Ideas for commands:
- No commands needed for this plugin.

Ideas for permissions:
- Idk

When I'd like it by:
- Before the 16th of June.

 

I am on it!

 

Thank you so much!