Its Graal Editor you get it from installing PC era and then when you log onto PC Era, Press start then go to install packages and install all of them.
Printable View
http://www.youtube.com/watch?v=F422dHdEy94
//#CLIENTSIDE
if (created) {
removetiledefs;
addtiledef era_tileset-summer-offline.png,,1;
}
make a blank npc in the editor and put this in it.
Your outsides lack detail, perhaps add more npc's like trees, shrubs, flowers, and some more tiles like dirt, sand, etc.