I need help about spiral scheme

How to make that spiral scheme?

value = {}
value.A = {"JohnA", "MaryA", "GeorgeA", "SallyA"}
value.B = {"JohnB", "MaryB", "GeorgeB", "SallyB"}
value.C = {"JohnC", "MaryC", "GeorgeC", "SallyC"}

xvalue = {value.A, value.B, value.C}


Dialog.Message("Name", xvalue[2[3]] ) ;for example i want to get GeorgeB value
it didn't happen like this :((