2. Make the Selection, make it however big or little you want larger sigs might need a bigger box than a 470x250 sig.
3. Layer, New Fill Layer, Solid Colour. (you can also use a Gradient, For installing Gradients go here)
5. Rotate the layer, you might need to move it up or down a bit to make sure both ends are in view and there are no gaps between that layer and the background later! once happy with:
6. Right Hand click on the layer, in the layer box, Duplicate Layer:
7. Now move this duplicated layer down to the bottom of the image, position it so it fits and equals the top layer just the other way round.