diff --git a/examples/turtle/fern_leaf_stencil.scad b/examples/turtle/fern_leaf_stencil.scad
new file mode 100644
index 00000000..ccbaa6a3
--- /dev/null
+++ b/examples/turtle/fern_leaf_stencil.scad
@@ -0,0 +1,64 @@
+include <hull_polyline2d.scad>;
+include <hollow_out.scad>;
+include <turtle/t2d.scad>;
+
+radius = 40;
+height = 3;
+thickness = 1;
+width = 1;
+
+min_leng = 0.1;
+k1 = 0.9;
+k2 = 0.3;
+
+module fern_leaf(t, leng, min_leng, k1, k2, width) {
+    t1 = t2d(t, "forward", leng = leng);
+    
+    hull_polyline2d([t2d(t, "point"), t2d(t1, "point")], width);
+    if(leng > min_leng) {
+        fern_leaf(
+            t2d(t1, "turn", angle = 70), 
+            k2 * leng, min_leng, k1, k2, width
+        );
+        
+        t2 = t2d(t1, "forward", leng = k1 * leng);
+        hull_polyline2d([t2d(t1, "point"), t2d(t2, "point")], width);
+        
+        t3 = t2d(t2, "turn", angle = -69.0);
+        fern_leaf(
+            t3, 
+            k1 * k2 * leng, min_leng, k1, k2, width
+        );
+        fern_leaf(
+            t2d(t3, "turn", angle = 68.0), 
+            k1 * k1 * leng, min_leng, k1, k2, width
+        );
+    }
+}
+
+module fern_leaf_stencil(radius, height, thickness, width, min_leng, k1, k2) {
+    $fn = 48;
+
+    linear_extrude(thickness) 
+    difference() {
+        union() {
+            translate([radius, 0])
+            scale([1, 0.5, 1])
+            hollow_out(radius / 3) 
+                circle(radius / 1.5);
+                
+            circle(radius);
+        }
+        translate([-radius, 0]) 
+            fern_leaf(
+                t2d(point = [0, 0], angle = 0), 
+                radius / 5, min_leng, k1, k2, width
+            );
+    }
+
+    linear_extrude(height) 
+    hollow_out(thickness) 
+        circle(radius + thickness);
+}
+
+fern_leaf_stencil(radius, height, thickness, width, min_leng, k1, k2);