How can I make a 3D holographic pyramid?

To make a 3D holographic pyramid, you will need a clear plastic material like acrylic or plexiglass, a smartphone or tablet, a holographic pyramid template, and a holographic video or image. First, cut the plastic material into a pyramid shape using the template. Place the pyramid on top of your device with the video/image playing underneath. The pyramid will reflect the image, creating a 3D holographic effect.