diff --git a/baumgen.js b/baumgen.js
index 6982993..afc1c2c 100644
--- a/baumgen.js
+++ b/baumgen.js
@@ -259,15 +259,18 @@ function draw() {
     var rowspace = 20;
     var inspace = 30;
     var outspace = 10;
+    var outline = true;
 
     var maxh = (height - (rows-1)*rowspace - 2*outspace - 2*inspace) / rows;
 
-    var outline = new Path.Rectangle({
-        point: new Point(outspace, outspace),
-        size: new Size(width - 2*outspace, height - 2*outspace),
-        strokeWidth: 2,
-        strokeColor: 'black'
-    });
+    if(outline) {
+        var outlinepath = new Path.Rectangle({
+            point: new Point(outspace, outspace),
+            size: new Size(width - 2*outspace, height - 2*outspace),
+            strokeWidth: 2,
+            strokeColor: 'black'
+        });
+    }
 
     for(var row=0; row<rows; row++) {
         var y = outspace + inspace + maxh * (row + 1) + rowspace * row;