I solved it.
I've attached an image of what to do.
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For those who are having difficulty understanding (I did), do this:
0) Use Array Get action, not Array Get Next action.
1) Make an Int Variable, call it index, set it on the INDEX Field of Array Get.
2) Add Add Int action on another state, set your INDEX int there.
3) Type 1 or -1 on Add Int action. Up to you.
4) Link it back to Array Get state, you'll see the INDEX changed the array.