diff --git a/src/__private__/__triangles_tape.scad b/src/__private__/__triangles_tape.scad
new file mode 100644
index 00000000..056013b7
--- /dev/null
+++ b/src/__private__/__triangles_tape.scad
@@ -0,0 +1,11 @@
+function __triangles_tape(leng_pts) =
+    concat(
+        [
+            for(i = [0:leng_pts / 2 - 2]) 
+                [i, leng_pts - i - 1, leng_pts - i - 2]
+        ],
+        [
+            for(i = [0:leng_pts / 2 - 2])
+                [i, i + 1, leng_pts - i - 2]
+        ]
+    );
\ No newline at end of file