1. Click on
File ->
New -> Chose a size ->
Ok
2. Chose the
Flood Fill Tool (F) and add a background.
3. Go to
Effects ->
3D Effects ->
Inner Bevel.
4. Chose the following options and then Click
OK.
5. Go to
Effects ->
Effect Browser ->
Effects ->
Reflection Effect ->
Feedback ->
Stagger Center.
Now you must have something like this:
You can also use Gradients and Patterns.
Made with Gradient:
