Gradients parameters:





Make a copy of the new made layer and select the Free Transform option to narrow a little the copy and stretch it out a little the way it is shown below (change the layer’s parameters).



The layer’s parameters:
Blending Options>Gradient Overlay



Gradient’s parameters:





Create a new layer having 20x20 px and 72 dpi and then apply the Rectangle Tool (U) about three times and turn over the copy with Free Transform option to create a kind of pattern of white color.