ScreenEdgeBuffer

Prototype
ScreenEdgeBuffer,NPC ID,UDLR Border,BUFFER SPACE,-,Active time,-

Description
Keeps NPCs from leaving the screen.
 * NPC ID is which type of NPC will be effected.
 * UDLR (Up Down Left Right) is which border of the screen the npc won't be able to pass.

UDLR:
 * 0 = Top
 * 1 = Bottom
 * 2 = Left
 * 3 = Right

BUFFER SPACE is how close the NPCs can get to the edge before being stopped.