In general it's very intuitive because I don't have to think about commands or something like this. I simply think about where I want to draw or which color I want to take. And by thinking, a person usually looks at that color. So I also then look at that color and the robot goes there because it detects my eye movements and where I'm looking, and it has the co-ordinates exactly so it goes there directly. So I don't have to think a lot about this when I'm controlling it.