The 4th Part ' 2684 3734 2638 3726' is the Range of where you would like the NPC to go.
The 3rd Part '0' is the height level of the monster, you should keep this at 0.
The 2nd Part '2680 3730' is the X&Y coordinates of the place where you want the NPCS to be. This is what monster it will be, in my case 1267 is a rock crab.
