Drone.extend('skyscraper',function(floors){
floors = floors || 10;
this.chkpt('skyscraper');
for (var i = 0;i < floors; i++)
{
this.box(blocks.iron,20,1,20)
.up()
.box0(blocks.glass_pane,20,3,20);
this.up(3);
}
return this.move('skyscraper');
});