diff --git a/src/thue_morse2.v b/src/thue_morse2.v
index 47716f6..6aaeff5 100644
--- a/src/thue_morse2.v
+++ b/src/thue_morse2.v
@@ -729,13 +729,6 @@ Proof.
 Qed.
  
 
-
-
-
-
-
-
-
 Theorem tm_step_square_pos_even : forall (n : nat) (hd a tl : list bool),
   tm_step n = hd ++ a ++ a ++ tl
   -> 0 < length a -> even (length (hd ++ a)) = true.
@@ -749,3 +742,7 @@ Proof.
 
 
 
+    (* TODO: utiliser tm_step_odd_prefix_square pour le cas impair *)
+
+
+