How to make the sunrise in your bedroom every morning. Many artists have used the Camera Obscura over the years, now make your own. – an optical experiment easy to do, but which, in spite of its simplicity, is able to give you a continuous marvel. What you have to do is simply mount a lens on the bedroom window. In this way, when you wake up in the morning, you will admire the outside scene projected on a wall of your bedroom. Link.
DIY Camera Obscura