Using the instrument represent a figure close to that from the next picture, that would have the same sizes.

Don’t forget to place out correctly the layers.
Blending Options-Gradient Overlay

Gradient’s parameters.

Take the previous instrument to make a figure with the shown parameters.

Blending Options-Gradient Overlay

Gradient’s parameters

The demonstrated instrument will be helpful in drawing another picture, but the sizes should be kept according to those from the picture.

Blending Options-Gradient Overlay

Gradient’s parameters

We have got the next in the end!