Using the
Ellipse Tool (U), make a flare on the left side of the menu’s palette.

The layer’s parameters:
Fill 0% on the layers.
Blending Options>Gradient Overlay
Gradient’s parameters: 

Make a copy of the last made layer and choose the
Free Transform option to place the copy exactly like in the picture below.

Using the same instrument, try to picture out a flare on the upper part of the buttons’ palette.

The layer’s parameters:
Fill 0% on the layers.
Blending Options>Gradient Overlay
Gradient’s parameters: