I used the image in the last post as my greetings card this Christmas (changing the title to ‘knock, knock’ because people found the existing one rather obscure). I took the picture in Budapest several years ago when the sight caught my eye on my way back to the hotel from a conference. When I looked at it again I was surprised by the feeling of optimism it inspired in me – despite the decreptitude of the wall. Perhaps this is something to do with the bright colours? or the jaunty angle of the mysterious square hitching device which reminds me of a knocker? Anyway quite a few people responded positively to it as an image and this has inspired me to revisit a project I never got round to developing – a website called Entropica I originally set up around 15 years ago with the intention of using it for writing and images associated with my fascination with entropy. So today I spent a happy afternoon (tinged with guilt because I should have been doing other things) uploading images to it. You can visit it here. I am not sure about the black background – it was the simplest template I could find that easily accommodated a lot of visual material. Comments welcome!