How to shoot the track of fairy wand with Xiaomi mobile phone?

You need to turn on the camera in Xiaomi's mobile phone first, and then turn on the delay mode in camera design. Then, when shooting, after people wave fairy wand, the delay mode will delay the video, so that fairy wand's motion trajectory can be shot.

Xiaomi mobile phone is a mobile phone released by Xiaomi. Xiaomi Company was formally established on March 3, 20 10. Is a research and development company of intelligent hardware and electronic products.