Do the job sequently(advanced tasksequence)

There were four stations like the model shows,

station 1, setup time 5s(need operator), process time 16s(no need operator);

station 2, setup time 5s(need operator), process time 16s(no need operator);

station 3, setup time 5s(need operator), process time 16s(no need operator);

station 4, setup time 5s(need operator), process time 16s(no need operator);

I wanna the operator follow a sequence--first,setup for station1 , secondly,go to station 2 and wait until finish station 2 setup,thirdly,go to station 3 and wait until finish station 3 setup,fourthly,go to station 4 and wait until finish station 4 setup,and finally go into step 1 and repeat step 1 to step 4.

My solution would be without having more information:

station 1 – OnEntry: closeinput(current);
station 4 – OnSetupFinish: openinput(node("/station1",model()));

This prevents new items to arrive in station 1 and to give the Operator an additional tasksequence.

Thanks,it works.Simple and useful!