I love optical illusions and the way that they mess with out brains and thoughts and this one is one of my favourite at the moment.. Although..here is a warning, if you watch this for too long it may make you feel sick. I know that is how I started to feel when I was editing and making it!

So what is happening here? It looks like the colours are making the lines and circles move, but watch carefully and see what happens when I remove the colours from that picture and make it black and white.

Once again, do only watch it for a short while, if you watch it twice in a row you may feel a little sick and giddy...