- You should see teal underneath the dotted black border below.
- There should be exactly two teal-bordered aqua rectangles visible inside the dotted border at all times, with yellow stripes above and below.
- As you scroll the element below the teal, aqua, and yellow regions should not move.
- However, as you scroll the aqua-and-teal element, a cat surrounded by an orange dotted border should come into view, with its own associated nested scrolling mechanism.
- As you scroll the aqua-and-teal element, the cat should move up and down with its border.
- As you scroll the numbers inside the orange border, the cat should not move.
- The aqua rectangles should be visible inside the dotted orange border.

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