Make a copy of the last made layer, but we must change on the copy the layer’s parameters with those indicated next: Blending mode-Lighter Color Blending Options>Gradient Overlay
Using the same instrument we’ll represent an inclined line, correcting its shape with the Convert Point Tool.
The layer’s parameters: Blending Options>Gradient Overlay
Gradient’s parameters:
Blending Options>Stroke
Gradient’s parameters:
Make ten copies of the layer that has on it the inclined line and choose Free Transform option to place the copies as it is done on the next picture.
Press Alt button and make a mouse click between the layers containing the inclined lines and the layer containing the horizontal line (on the layers’ panel). In this case the layers with the inclined lines will be applied in the limits of the horizontal line.