Here's an example of using my tool from
post #66 on the first page of this thread but simplified by using a 9 days out of 18 instead of 90 out of 180. So you were wondering about 60 in, 60 out and then 30 in. I'm transforming that to 6, 6, 3. H stands for home (or out) and E stands for Europe (or in, but I should have used S for Schengen). The two numbers on each line indicate day (or line) number and then the number of days spent in the Schengen area within the 18 day window. Line 0 is there to show you haven't spent any time in the area within the last 18 days.
HHHHHHHHHHHHHHHHHH 0 0
EHHHHHHHHHHHHHHHHH 1 1
EEHHHHHHHHHHHHHHHH 2 2
EEEHHHHHHHHHHHHHHH 3 3
EEEEHHHHHHHHHHHHHH 4 4
EEEEEHHHHHHHHHHHHH 5 5
EEEEEEHHHHHHHHHHHH 6 6
Now you have 6 days in.
HEEEEEEHHHHHHHHHHH 7 6
HHEEEEEEHHHHHHHHHH 8 6
HHHEEEEEEHHHHHHHHH 9 6
HHHHEEEEEEHHHHHHHH 10 6
HHHHHEEEEEEHHHHHHH 11 6
HHHHHHEEEEEEHHHHHH 12 6
Now you have 6 days in followed
by 6 days home. You can spend
more time in.
EHHHHHHEEEEEEHHHHH 13 7
EEHHHHHHEEEEEEHHHH 14 8
EEEHHHHHHEEEEEEHHH 15 9
You have 9 days in an 18 day window.
You have to leave.
HEEEHHHHHHEEEEEEHH 16 9
HHEEEHHHHHHEEEEEEH 17 9
HHHEEEHHHHHHEEEEEE 18 9
On day 19 the last E disappears.
You can re-enter.
EHHHEEEHHHHHHEEEEE 19 9
EEHHHEEEHHHHHHEEEE 20 9
And so on.