Gradient's parameters.
Copy this layer and apply Free Transform option to turn it also around. Don't forget about its placement.
Make use of another instrument now 
and represent the next circle with the sizes demonstrated below.
Blending Options-Inner Shadow
Blending Options-Inner Glow
Gradient's parameters.
Blending Options-Bevel and Emboss
Blending Options-Gradient Overlay
Gradient's parameters.
Take the next instrument now 
and introduce in our picture a rectangle with the sizes from next image.
Blending Options-Gradient Overlay
Gradient's parameters.
Using the next tool , insert a new rectangle now with the parameters from next step.
Blending Options-Gradient Overlay
Gradient's parameters.
Apply again tool and picture the necessary circle. Choose then the same tool, but keep pressed this time the Alt button to introduce another opening in our picture.
Blending Options-Bevel and Emboss
Blending Options-Gradient Overlay
Gradient's parameters.
Apply the previous instrument again to picture the next circle. It must have the parameters from next image.
Blending Options-Gradient Overlay
Gradient's parameters.
Copy the new made layer and apply the parameters from next step.
Blending Options-Bevel and Emboss
Blending Options-Gradient Overlay
Gradient's parameters.
Take next tool and introduce one more circle that is of next parameters.
Blending Options-Gradient Overlay
Gradient's parameters.
Keep using the same tool to insert another circle with the next sizes.
