Forum : What do you see when you stare at a blank wall?

I asked this week to friends to stare a blank wall – what do you see? In my case, I’m used to stare to a blank wall or a candle – but I don’t try to empty my mind because this is impossible. I rather try to follow my train of thought on what happens inside of me and I’m not entirely conscious. So: stare to a blank wall and share here what you see.