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9. Unfold the previous step.
10. Fold the bottom left corner diagonally up to the top right corner.
11. Unfold the previous step.
12. Bring the left and right edges forwards and down.
13. Flatten the paper, this is now an origami water bomb base.
14. Fold the bottom left and right points up to the top point.
15. Take the top left point and bring it down to the bottom edge, make a small pinch to mark the middle point.
16. Fold the point back up to the top.