1. Open the PPT and insert a background image into the slide.
2. Insert shape "straight line", suitable length.
3. Set the format for "straight line": gradient color, white, increase the width, and set the transparency to 100% at one end.
4. Add an animated "straight line" effect to the line.
5. Adjust the position and path to make it more natural.
6. Make two or three more of these "Meteors."
7. Design different play time and delay time.
8. Play and enjoy the beautiful meteor shower effect.