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This is called light painting photography, and auxiliary equipment: tripod, led lamp and other single-beam strong light sources (wrapped in color or color film in front of the lamp holder), and wireless shutter remote control if shooting alone.

First, fix the camera with a tripod, reduce the aperture and ISO, and add a gray-scale mirror on the lens when necessary to extend the exposure time of the camera to more than ten seconds. Go to the place where you want to draw light, turn on the camera shutter and the strong light LED lamp, swing the strong light lamp at a uniform speed to make the light track conform to your design pattern, complete the above actions within one fifth of the total exposure time, then turn off the LED lamp and leave quickly, so that the camera can complete the remaining exposure of the background.

Method 2: Synthesis by multiple exposures.

Method 3: Post-processing, such as PS.