Take a new file of 1280 pixels, 1024 pixels, of resolution 72 dpi in the RGB mode.
 Take a new layer and fill it with black
 Take another New layer and make a Circle with Elliptical Marquee Tool and fill it with White.
 Make a New document, 20 pixels x 20 pixels, RGB, background transparent
 Use your circular marquee to draw a circle and fill it with... Read more →