Have fun and keep fit making line art drawings based on tracking your GPS co-ordinates as you travel around with your iPhone 3G or 3GS. You can use any mode of transport such as walking, cycling or driving, as long as your iPhone can see the sky and you can stay safe you will be able to make your virtual mark on the world. It works best on a grand scale so spread your wings and explore the world beyond your back yard.

To get going simply start a new drawing, choose a pen colour and off you go.