Gradient’s parameters:

Combine in a group both layers of the last made button (press as usually the Ctrl button to mark out the corresponding layers and keep pressed the left mouse’s button while moving the marked layers on Create a new group option). Make three copies of the last made group and use the Free Transform option to place the copies as it is demonstrated below:

Select again the Rectangle Tool (U) to draw an inclined line on the left side of the page’s top.

The layer’s parameters: Blending Options>Drop Shadow

Blending Options>Gradient Overlay

Gradient’s parameters:

Write the site’s title:

The layer’s parameters: Blending Options>Drop Shadow