diff --git a/CommandScript.java b/CommandScript.java
index 14d74f4..5caa81c 100644
--- a/CommandScript.java
+++ b/CommandScript.java
@@ -154,7 +154,12 @@ public class CommandScript extends CommandBase {
         }
         // Now evaluate the string we've colected.
         notifyAdmins(par1ICommandSender, "js> " + s, (Object[])args);
-        Object result = ctx.evaluateString(scope, s, "<cmd>", 1, null);
+        Object result = null;
+        try {
+            result = ctx.evaluateString(scope, s, "<cmd>", 1, null);
+        }catch(Exception e){
+            notifyAdmins(par1ICommandSender, "ERROR: " + e.getMessage(), (Object[])args);
+        }
         if (result != null){
             notifyAdmins(par1ICommandSender, Context.toString(result), (Object[])args);
         }
diff --git a/drone.js b/drone.js
index 201f576..7509e7c 100644
--- a/drone.js
+++ b/drone.js
@@ -338,7 +338,9 @@ var Drone = {
     // block dirs:  0 = east, 1 = west,  2 = south , 3 = north
     // sign dirs:   5 = east, 3 = south, 4 = west, 2 = north
     Drone.PLAYER_STAIRS_FACING = [0,2,1,3];
-    Drone.PLAYER_SIGN_FACING = [4,2,5,3]; // for blocks 68 (wall signs) 65 (ladders) 61,62 (furnaces) 23 (dispenser) and 54 (chest)
+	 // for blocks 68 (wall signs) 65 (ladders) 61,62 (furnaces) 23 (dispenser) and 54 (chest)
+    Drone.PLAYER_SIGN_FACING = [4,2,5,3]; 
+	 Drone.PLAYER_TORCH_FACING = [2,4,1,3];
 
     Drone.prototype.prism0 = function(block,w,d){
         this.prism(block,w,d).fwd().right().prism(0,w-2,d-2).left().back();
diff --git a/fort.js b/fort.js
new file mode 100644
index 0000000..7302da2
--- /dev/null
+++ b/fort.js
@@ -0,0 +1,55 @@
+var scriptDir = $SCRIPT_DIR;
+load(scriptDir + "/drone.js");
+
+function fort(d, side, h)
+{
+	 if (typeof d == "undefined")
+		  d = new Drone();
+	 if (typeof side == "undefined")
+		  side = 18;
+	 if (typeof h == "undefined")
+		  h = 6;
+	 if (h < 4 || side < 10)
+		  throw new java.lang.RuntimeException("Forts must be at least 9 wide X 4 tall");
+	 // make sure side is even
+	 if (side%2)
+		  side++;
+	 var brick = 98;
+	 // build walls.
+	 d.chkpt('fort').box0(brick,side,h-1,side);
+	 //
+	 // build turrets
+	 //
+	 d.up(h-1);
+	 for (i = 0;i <= 3;i++){
+		  var turret = [];
+		  d.box(brick) // solid brick corners
+				.up().box('50:5').down() // light a torch on each corner
+				.fwd(); 
+		  turret.push('109:'+ Drone.PLAYER_STAIRS_FACING[d.dir]);
+		  turret.push('109:'+ Drone.PLAYER_STAIRS_FACING[(d.dir+2)%4]);
+		  d.box(turret,1,1,side-2).fwd(side-2).turn();
+	 }
+	 //
+	 // build battlements
+	 //
+	 d.move('fort');
+	 d.up(h-2).fwd().right().box('44:5',side-2,1,side-2);
+	 var battlementWidth = 3;
+	 if (side <= 12)
+		  battlementWidth = 2;
+	 
+	 d.fwd(battlementWidth).right(battlementWidth).box(0,side-((1+battlementWidth)*2),1,side-((1+battlementWidth)*2));
+	 //
+	 // add door
+	 //
+	 var torch = '50:' + Drone.PLAYER_TORCH_FACING[d.dir];
+	 d.move('fort').right((side/2)-1).door2() // double doors
+		  .back().left().up().box(torch) // left torch
+		  .right(3).box(torch); // right torch
+	 //
+	 // add ladder up to battlements
+	 //
+	 d.move('fort').right((side/2)-3).fwd(1).box('65:' + Drone.PLAYER_SIGN_FACING[(d.dir+2)%4], 1,h-1,1);
+	 return d.move('fort');
+};