How to take a photo effect of light painting with mobile phone?

Light painting photography, also known as light graffiti, is a photography method that moves a hand-held light source in a dark environment and exposes the camera for a long time to create special effects. Also called light painting and light photography. At present, colorful and fashionable light graffiti has become one of the most popular street arts.

Therefore, the mobile phone can't directly take the photo effect of light painting. The reason is that mobile phone photos cannot be exposed for a long time (tens of seconds or even minutes). However, the mobile phone can take a photo effect of light painting by superimposing pictures later. For example, Keow Wee Loong, a photographer from Malaysia, was invited by smartphone manufacturers to use the built-in function of the mobile phone to take a light-painted photo in the form of "shooting stars"!