4:------------------------------
3:------------------------------
2:-0-0--3-5-6--7----------------
1:------------------------------
4:------------------------------
3:------------------------------
2:-0-0--3-7-6--5----------------
1:------------------------------
4:------------------------------
3:------------------------------
2:-0-0--3-5-6--7----------------
1:------------------------------
4:------------------------------
3:------------------------------
2:-0-0--3-7-6--5----------------
1:------------------------------
pretty much keep repeating....