diff --git a/src/experimental/note.md b/src/experimental/note.md
index fc620fc9..538714d5 100644
--- a/src/experimental/note.md
+++ b/src/experimental/note.md
@@ -9,3 +9,5 @@ to_do:
 - matrix/m_determinant
 - turtle/lsystem2
 - turtle/lsystem3
+- turtle/footprints2
+- turtle/footprints3
\ No newline at end of file