I take my iPhone and use a App that takes the camera Flashlight and turns into a lantern. It cam make with a small lantern or other cell phone that have similar app.
I take some blue plastic and put on the front of the flashlight to make the light blue. I held with a tape.
I turn out all the lights in the room, only the blue flashlight from iPhone works. Put my camera to capture five second of a shot.
When I start the process, put the iphone behind she sword and started to move slowly to light all the sword, and then move fast to the other side and pass the Iphone in front of the Figma to make the Speed Light Effect.