diff --git a/README.MD b/README.MD
index 911156c..56c660a 100644
--- a/README.MD
+++ b/README.MD
@@ -1 +1,9 @@
 Files for Advent of Code 2023, and related stuff. Hoping to work with Fortran as much as possible; will also try AOC2019 if I can.
+
+Structure:
+
+* 2019
+    * src/
+    * obj/
+    * bin/
+