<--12----10--------10-12---------------------->
<--------------------------------------------->
<-----12-----------------12---------repeat-2x->
<--------------------------------------------->
<--------------------------------------------->
<--------------------------------------------->


<---12------------------------------------------------------------------------->
<----------12----13-----12-------------------------------------------------12-->
<------9-9----9-9---9-9----9-9-12-9-11-9--12-9-9-11-9-9-12-9-9-11-9-9-12-9----9>
<------------------------------------------------------------------------------>
<------------------------repeat-3x--------------------------------------------->
<------------------------------------------------------------------------------>