Square Circle

A square circle is a non-perfect circle that can look like a circle.

Great
For example, look at the image. you will notice that the circles keep getting less pixelated. the biggest one is a level 4. The great of all of them is 2, because you draw a certain amount of pixels at the top, and the amount keeps getting sliced in half. When there is only 1 pixel, it goes the other way. If it had a great of a number non-computably close to 1, it would look like a circle, the closer the great is to 1, the more it looks like a circle, but if it has a great of exactly 1, it would be a straight line.