diff --git a/.gitmodules b/.gitmodules
index 0be8502..ef9737d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -110,3 +110,6 @@
 [submodule "2021/beardhatcode"]
 	path = 2021/beardhatcode
 	url = https://github.com/beardhatcode/aoc-2021/
+[submodule "2021/redfast00"]
+	path = 2021/redfast00
+	url = https://github.com/redfast00/aoc2021
diff --git a/2021/redfast00 b/2021/redfast00
new file mode 160000
index 0000000..43228ba
--- /dev/null
+++ b/2021/redfast00
@@ -0,0 +1 @@
+Subproject commit 43228bada38076d3144fa48fbd16e562b8f98113
diff --git a/README.md b/README.md
index d15044e..814b9d5 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@
 | Francis.       | https://github.com/FKD13/AoC2021.git              | Prolog      |
 | Lox            | https://github.com/Silox/2021-advent-of-code.git  | Ruby        |
 | beardhatcode   | https://github.com/beardhatcode/aoc-2021          | Rust        |
+| redfast00      | https://github.com/redfast00/aoc2021              | Python      |
 
 
 * repo clonen: