the params is the direction that the npc is facing. That unit can take prices from 1 to 4, depends of the direction.
The range means how fast you want ur npoc to moving. If you type the number 1, the npc will move fast. 2 goes slower 3 more slow etc... If you type No 7 the npc will not move at all. Stand still.
End last, count is the number of npc's you want to spawn on that area.
For example if you want a non moving npc that will be a shop, you type: params 1, range 7, count 1.
If you want to spawn 3 crows on that area then that could look like that: Params 1, range 2, counr 3.