Create a new document 11 inches wide by 8.5 inches tall. With the Ellipse Tool, create an ellipse that is 2.5 inches by 2.5 inches. Fill the ellipse with a green color and take off the Stroke. Next, use the Direct Selection Tool and select the bottom anchor on the ellipse and drag it down about half an inch.
Select the oblong ellipse and Copy and Paste In Front. Select the newly copied object with the Selection Tool and grab the bottom anchor. Then squish the ellipse about a quarter of an inch up. Fill the slightly squished ellipse with a light green color.