diff --git a/source/SpinalHDL/Introduction/A simple example.rst b/source/SpinalHDL/Introduction/A simple example.rst
index 0d764662d6e..4219e090a69 100644
--- a/source/SpinalHDL/Introduction/A simple example.rst	
+++ b/source/SpinalHDL/Introduction/A simple example.rst	
@@ -105,6 +105,16 @@ Finally, there is the component logic:
 initial value 0. Assignments to a registers can be read only after the next
 clock sampling.
 
+.. note::
+
+   REVIEWME We introduce the notion of the clock here but fail to explain
+   how that is conveyed / exists in the example.  I think that is an important point
+   to understand early on in the learning process.
+   The below note does not really explain the concept of time, it is
+   more important for a new user to translate the Scala code into HDL execution with
+   understanding the clock and time relation to the code, than it is to know there
+   are 2 hidden signals around somewhere.
+
 .. note::
 
    Because of the presence of a register, two implicit signals are added to the