Step 1

Create a 400 x 400 document and with the Layer tool, create a 80 px diameter circle. Add a White & Black radial gradient. Next, turn your vector object into a bitmap: right-click and select > Layer Selection (Convert to Bitmap).



Step 2

For the Second Layer draw a circle (example) 60x60 with the Oval Marquee Tool with 'Fixed Size' selected as shown. Center the second circle on the first one.



Rotate by 180: Modify > Transform > Rotate 180 .

Tip: Select Ctrl D to deselect the Layer tool



Step 4

And now a 1 pixel contraction: Select > Layer Marquee > 1px



Step 5

Last rotation: Modify > Transform >

The layer should be complete