The WAIT(<wait parameter list>) [<start index>] form is used to specify a round-robin or other sequence of testing. The arithmetic expression <start index> represents the position of the item in the <wait parameter list> that should be tested first. The index of the first item is one, the second is two, and so on. If the value of the <start index> is less than one or greater than the last item in the list, it is set to one. Note that if a value for (<time>) is specified in the wait parameter list, it is always tested first.