I found this on you tube, but there are plenty more on there which should give you a good idea how to make the patterns, or inspiration for your own. You do have to use an espresso machine, and if you poured your espresso into a small glass, it would have a head on it - like a small Guiness. You pour your Espresso into the cup, then add your foamed milk like in the video. When it comes to the bit where you create your pattern, the secret is to get the spout of the jug near to the surface of the cup.
I shall expect to see some of your efforts in your blogs. I am now saving up for an espresso machine as you cannot achieve this with a cafetiere!! Good Luck!