1. Body is the display of the main page of HTML5 web, which mean it can't be edited with any kind of shape.. You only can change it's size, color and every inheritance property
2. If you want to make a circle, try to make it with "div" block element or make it with "svg" element with "circle" or "ellipse" element inside it..
3. Check your syntax bruhh..
Because you can't make a circle with the body. You have to declare a div and class than style it in css with proper syntax which you don't bother about I think. So please write the code with proper syntax. And also give the div a background which you have not given in your code.