Go to File >> New document set new document space with width & height at 300 pixels. And set resolution at 72 pixles/inch in RGB mode. New layer name greenbig. Use eliptical marquee tool to create circle and fill color with code number = 339900. After that go to menu select choose deselect. New layer name greensm. Use eliptical marquee tool to create small circle and change color code name to 99CC00. Then Fill color in the selection and go to menu select choose deselect.Use move tool to replace small ball align to center at bottom of the big ball. After your two balls set at proper position. Use link chain to make this two layer go together when you want to move this two objects again.
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