If you want to recreate the "black screen" effect physically: Use as your background.
Fold the top edges into the center crease to create a kite shape. free_thunder_lighting_effects_black_screen_gree...
Use a series of "zigzag" or "z-folds" (folding forward and then immediately back) to create the jagged angles characteristic of a lightning bolt. If you want to recreate the "black screen"