Room.prototype.layoutRoom=function(){
    var s:Spawn=this.spawns()[0]
    var c:Controller=this.controller;

    //get path from spawn to controller
    var path = this.findPath(s.pos, c.pos, {ignoreDestructibleStructures: true});

    //place container on last part of path -3 to stay 1 away from controller, and closest to spawn
    //length-1= on endpoint, -2 is one step away, -3 is two steps away
    var loc=path[path.length-3]
    console.log('layout room, put container: '+loc.x+' '+loc.y)
    this.createConstructionSite(loc.x, loc.y, STRUCTURE_CONTAINER);
}