- You should see teal underneath the dotted black border below.
- There should be exactly four aqua rectangles visible inside the dotted border at all times.
- As you scroll the element below the teal and aqua should not move.
- However, as you scroll the aqua-and-teal element, a cat surrounded by an orange border with yellow dots 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.

1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
10 11 12 13 14 15 16 17 18 19 20