diff --git a/examples/tree.scad b/examples/tree.scad
new file mode 100644
index 00000000..1a006076
--- /dev/null
+++ b/examples/tree.scad
@@ -0,0 +1,38 @@
+include <turtle/turtle3d.scad>;
+include <line3d.scad>;
+
+module tree(t, leng, leng_scale1, leng_scale2, leng_limit, 
+            angleZ, angleX, width) {
+    if(leng > leng_limit) {
+        t2 = turtle3d("xu_move", t, leng);
+
+        polyline3d(
+            [turtle3d("pt", t), turtle3d("pt", t2)], 
+            width);
+
+        tree(
+            turtle3d("zu_turn", t2, angleZ),
+            leng * leng_scale1, leng_scale1, leng_scale2, leng_limit, 
+            angleZ, angleX, 
+            width);
+
+        tree(
+            turtle3d("xu_turn", t2, angleX), 
+            leng * leng_scale2, leng_scale1, leng_scale2, leng_limit, 
+            angleZ, angleX, 
+            width);
+    }    
+}
+
+leng = 100;
+leng_limit = 1;
+leng_scale1 = 0.4;
+leng_scale2 = 0.9;
+angleZ = 60;
+angleX = 135;
+width = 2;
+
+t = turtle3d("create");
+
+tree(t, leng, leng_scale1, leng_scale2, leng_limit, 
+     angleZ, angleX, width);
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