Create a new file that would have
766x500 px and
72 dpi. Apply the
Layer Style for it.
Blending Options-Gradient Overlay
Gradient’s parameters: 
Represent a stripe colored in
444444 on the background’s bottom. It’s possible to do that with the shown instrument

. You must get the next result.

Next step we must represent another stripe with the same instrument, but this time with the color
656565. It must be placed a little upper than the previous layer.
Make use of the next instrument

to draw a cliché like the next one (keep the same grey color)

Save the picture!

Blending Options-Pattern Overlay