Motion edit prompt

Begin with the shield and medical cross hidden. Reveal the shield border progressively: start from the bottom point and expand simultaneously up the left and right sides, leaving the top arch as the last area to close. Once the shield outline is complete and stationary, reveal the medical cross at the center by scaling it uniformly from zero, overshooting slightly larger than its size in the provided SVG, then rebounding slightly smaller than that size, making one much smaller second overshoot, and settling back to its centered position and size in the provided SVG. Keep all elements fixed in position after they finish animating.