or if you feel lazy
...
setshape2 width,height,{tiletypes,...}
Lets the npc behave like a level, which means you can set
what size it has (in tiles) and how the tiles behave;
e.g. do setshape2 2,2,{3,3,3,3}; to make an npc that behaves
like a chair. Following tile types are supported:
0 nonblocking
2 hurting underground
3 chair
4 bed upper side
5 bed lower side
6 swamp
7 lava swamp
8 near water
9 near lava
11 water
12 lava
20 throw-through (fences)
21 jumping stone
22 blocking tile