Select the Ellipse Tool (U) and draw a circle now and then press on the Alt button to represent one more circle inside the first one as it is represented on the next picture. The color’s code in this case is #F9F2AC

We need to apply the next Blending Options>Inner Shadow for our moon element.

Select all our layers and combine all of them in a group. Make a copy of the group and press on the Ctrl+E to Merge Down all the layers from the group in a one layer. Using the Free Transform option, it’s necessary to turn the copy vertically. Delete with the Eraser Tool (E) that has a black gradient.

Using the Smudge Tool (R), we need to represent different patches on the water as if it was water in motion.

Fill 25% on the layer.

The wallpapers are finished!