From ba7a4978b555cac2378d909a502b04940df628ce Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Thu, 14 May 2020 08:09:40 +0800
Subject: [PATCH] update

---
 src/experimental/note.md | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/experimental/note.md b/src/experimental/note.md
index fcb3aac2..520016d7 100644
--- a/src/experimental/note.md
+++ b/src/experimental/note.md
@@ -11,4 +11,7 @@ to_do:
 - turtle/lsystem2
 - turtle/lsystem3
 - turtle/footprints2
-- turtle/footprints3
\ No newline at end of file
+- turtle/footprints3
+- pixel/px_union
+- pixel/px_intersection
+- pixel/px_difference