6. Add a new layer and select the Elliptical Marquee Tool with fixed dimensions width=230px, height=230px. Click somewhere in the left corner.
7. Hit Ctrl+Backspace. The circle now fills with white.
8. Hit Ctrl+T and center the circle (x=200, y=200)
9. Select the underlying layer (from step 3) and Ctrl+click the layer from step6. Hit delete.
10. Delete the top layer
11. Add a new layer and select the Rectangular Marquee Tool with fixed dimensions width=100px, height=80px. Click somewhere in the left corner.
12. Hit Ctrl+Backspace. The rectangle now fills with white.
13. Hit Ctrl+T and move the rectangle (x=200, y=65)
14. Select the underlying layer and Ctrl+click the layer from step11. Hit delete.
15. Delete the top layer
