If three shooters they will start on stand 1, 2, 3 and after the menu move to 2, 3 and 4 and then to 3, 4, 5 and then to 4, 5, 1 and that last shooting on stand 5, 1, 2.
Do I understand correctly . . . You want to DeSelect the unused stands from automatically throwing the clay? So you would throw in sequence 123, 234, 345, 451, 512 for 3 shooters . . . 1234, 2345, 3451, 4512, 5123 for four shooters . . . ? You should be able to do that using an array and shift the bits over.