How do you connect four straight lines without lifting pen or pencil?

A little hard to describe, start on the bottom left dot, go upwards to the top left dot but do not stop, carry on going up as though there is another invisible dot above it (ONE LINE), go down diagonally right so the first dot you reach is the top line second left dot, carry on going to the bottom right dot (TWO LINES), go up to the top right dot and carry on up as though there is another invisible dot above it (THREE LINES), go down diagonally left to the top line second right dot, carry on going diagonal to the bottom left dot (FOUR LINES), then go right to the bottom right dot (FIVE LINES).

See the Related Link below for a graphic.