~ let ring
---------------------|r---------------------|e----------------0----|p-------03-0303----e--| X4---023---------------|a-3-------------------|t
-777778-10---787---------------777778-10---787--------------|-----------8-----8~----------------------8-----8~-----------|----------------------------0-----------------------------0-|--------------------03-0303-----------------------03-0303---|------------------------------------------------------------|------------------------------------------------------------|
--------------------------------------|---------------------------------8~---|--10-10-10-10-10--10-10-10-10-10------|--------------------------------------|--------------------------------------|--------------------------------------|