使用绿色背景上带有追踪点的手机 Hands using a cellphone with tracking point on a green background

手持带有跟踪点的绿色屏幕的智能手机的人的手，同时在手后面的色度绿色背景上在屏幕上滑动手指。

Hands of a person with a smartphone with a green screen with a tracking point, while sliding the finger across the screen, on a chroma green background behind the hands.