Make a new file 100x100.
Using the selection tool on radial, make a circle.
Now use the gradient tool and set the type to radial.
Select a foreground and background color.
Click on the top-left of the button and drag to the bottom-right.

Now click on SELECT>MODIFY>CONTRACT, and contract
selection by 8.

Select LAYER>TRANSFORM>ROTATE 180

Now click on SELECT>MODIFY>CONTRACT, contract by 4 this time.
Click on SELECT>FEATHER, and feather the selection by 2.

Select LAYER>TRANSFORM>ROTATE 180

That's it! Use the text tool to enter text or dingbats to finish.