How to Create Light Motion Trails

1). Set the camera to manual mode. This can usually be accomplished by dialing a rotating dial into "M" mode or setting the mode to "M" through an electronic menu. All cameras are different so consult with the camera's manual for exact directions.
2). Set the shutter speed to a "slow" setting. A one-second shutter speed means that the shutter is opened for a full second. A 1/60-shutter speed means that the shutter is opened for a fraction (1/60th) of a second. The longer the exposure, or the slower the speed, the more time the shutter remains open to capture light trails.
3). Place the camera on a sturdy surface to avoid body-induced vibrations that could cause excess blurriness.
4). Press the shutter button to take a picture while moving the light source in the frame to create "trails."