diff --git a/README.md b/README.md
index f62ea94..47954f5 100644
--- a/README.md
+++ b/README.md
@@ -33,8 +33,9 @@ import numpy as np
 # Define an array of triangles
 # Following the STL standard, each triangle is defined with : normal, v0, v1, v2
 quad = np.array([
-    [[0.0, 0.0, 1.0], [0.0, 0.0, 0.0], [1.0, 0.0, 0.0], [1.0, 1.0, 0.0]],
-    [[0.0, 0.0, 1.0], [0.0, 0.0, 0.0], [0.0, 1.0, 0.0], [1.0, 1.0, 0.0]],
+    # normal,          v0,              v1,              v2
+    [[0.0, 0.0, 1.0], [0.0, 0.0, 0.0], [1.0, 0.0, 0.0], [1.0, 1.0, 0.0]], # Triangle 1
+    [[0.0, 0.0, 1.0], [0.0, 0.0, 0.0], [0.0, 1.0, 0.0], [1.0, 1.0, 0.0]], # Triangle 2
 ])
 
 # Serialize the triangles to a file