I made this back in 2012 and never wrote it up. Mind you, I’m still in two minds as to whether it works well. If you know it’s an Aperture Science logo it looks like one, but I think otherwise it just looks like a camera iris / aperture / spiral thing. Since making this I bought some mirrored glass which might have been better in the middle, as actually I don’t really open the curtains too much – it lets out heat in winter, and lets in sun on my monitor in summer! A mirrored centre would allow me to hang it on a wall. Maybe I’ll look for some adhering foil backing…