This is called pinhole camera. A very simple camera with no lens and a single very small aperture. It is a light proof box with a small hole in one side. Light from a scene passess through this single point and projects an inverted image on the opposite side of the box. The smaller the hole, the sharper the image.
Just using a shoe box layering with black paper,make sure there's no light can get to the box,so it must really cover with all black and a can or alluminium foil for the aperture.
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