diff --git a/examples/hollow_out/hollow_out_holder.scad b/examples/hollow_out/hollow_out_holder.scad
index 742ae01c..c2326d89 100644
--- a/examples/hollow_out/hollow_out_holder.scad
+++ b/examples/hollow_out/hollow_out_holder.scad
@@ -1,7 +1,6 @@
 use <hull_polyline3d.scad>;
-use <util/rand.scad>;
-use <experimental/tri_bisectors.scad>;
 use <experimental/ptf_bend.scad>;
+use <hollow_out_square.scad>;
 
 width = 5;
 columns = 30;
@@ -9,35 +8,6 @@ rows = 15;
 radius = 30;
 angle = 360;
 thickness = 2;
-
-function h_lines_in_square(width) = 
-    let(
-        w = width / 2,
-        i = ceil(rand() * 10) % 2,
-        tris = i == 0 ? 
-                [
-                    [[0, 0], [width, 0], [width, width]],
-                    [[0, 0], [width, width], [0, width]]
-                ] 
-                :
-                [
-                    [[width, 0], [0, width], [0, 0]],
-                    [[width, 0], [width, width], [0, width]]
-                ]
-    )
-    concat(tri_bisectors(tris[0]), tri_bisectors(tris[1]));
-
-function hollow_out_square(size, width) =
-    let(
-        columns = size[0],
-        rows = size[1]
-    )
-    [
-        for(y = [0:width:width * rows - width])
-            for(x = [0:width:width * columns - width])
-                for(line = h_lines_in_square(width)) 
-                    [for(p = line) p + [x, y]] 
-    ];
     
 lines = concat(
     hollow_out_square([columns, rows], width),
diff --git a/examples/hollow_out/hollow_out_square.scad b/examples/hollow_out/hollow_out_square.scad
new file mode 100644
index 00000000..dd75cb56
--- /dev/null
+++ b/examples/hollow_out/hollow_out_square.scad
@@ -0,0 +1,31 @@
+use <util/rand.scad>;
+use <experimental/tri_bisectors.scad>;
+
+function h_lines_in_square(width) = 
+    let(
+        w = width / 2,
+        i = ceil(rand() * 10) % 2,
+        tris = i == 0 ? 
+                [
+                    [[0, 0], [width, 0], [width, width]],
+                    [[0, 0], [width, width], [0, width]]
+                ] 
+                :
+                [
+                    [[width, 0], [0, width], [0, 0]],
+                    [[width, 0], [width, width], [0, width]]
+                ]
+    )
+    concat(tri_bisectors(tris[0]), tri_bisectors(tris[1]));
+
+function hollow_out_square(size, width) =
+    let(
+        columns = size[0],
+        rows = size[1]
+    )
+    [
+        for(y = [0:width:width * rows - width])
+            for(x = [0:width:width * columns - width])
+                for(line = h_lines_in_square(width)) 
+                    [for(p = line) p + [x, y]] 
+    ];
\ No newline at end of file