[----------------------------------------------------------------
----------------------------------------------------------------
---12-12--12-12-12----11-11--11-11-11-11-11----12-12--12-12-12--
---10-10--10-10-10----9--9---9--9--9--9--9-----10-10--10-10-10--
---10-10--10-10-10----9--9---9--9--9--9--9-----10-10--10-10-10--
----------------------------------------------------------------
----------------------------------------------------------------
----------------------------------------------------------------
---9--9-9-9----8--8-8-8-----------------------------------------
---7--7-7-7----6--6-6-6-----------------------------------------
---7--7-7-7----6--6-6-6-----------------------------------------
----------------------------------------------------------------]
repeat a few times