1. Click somewhere outside the stage and start dragging until you get an oval shape like this one:
Select the Line tool (N). Press and hold down Shift, then click and start dragging your mouse diagonally — you should get a 45-degree line. Draw it somewhere below the oval shape and make sure that it is running from upper left to bottom right, like the one seen in the image below.
Select the Selection tool (V). Bring your cursor near the middle of the line. You will see a small curve appear below your cursor, showing you that the line is ready to be manipulated with.
Use the Selection tool (V) in the same way that you did in step 11 to modify the new curve. It should be a little more straight than the first one, seen right next to it in both images below.
Bring your cursor near the curve’s bottom end. An arrowed cross will appear. Click and drag the curve over to the original one. Aim for the bottom point of the other curve. Once the curve is ready to snap into place, a bold black circle will appear. Release your mouse. Voila’! The two curves are now joined together.
Click once on the small part of the curve that is inside the oval shape to select it. Hit Backspace or Deleteto erase it.
Select the Paint Bucket tool (K) and click on the small part between the two curves to fill it up with color (which should be white).