diff --git a/TODO.md b/TODO.md
index 85f5f15..373dc67 100644
--- a/TODO.md
+++ b/TODO.md
@@ -4,6 +4,12 @@ To-do:
 
 * render a basic wireframe (vertices and edges)
 
+  - cylinder and spheres
+  - group these
+
+-- DONE
+
+
 * algorithm for 4d -> 3d transform
 
 * 4D shape -> 3D projection -> wireframe -> three.js
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