It doesn't matter if you have an image of a circle, the computer will just see it as a rectangle. This is because all images are rectangles. For all of the images we're going to use, the position of the image is measured from the top left corner of the image as shown in the red square where it's position is (x2, y2).
The position of a circle is measured from the center of the circle as shown in the blue circle where it's position is (x1, y1). We were using pygame's circle to draw most of our graphics before. The first thing we need to understand when we're drawing images to the screen is how they are positioned.
