Feature request - sprites with basic shape (oval or rectangle) and color

When doing basic code, would be great to have a 'simple shape' sprite, even just a rectangle or oval with a settable color can get a lot of code going, features working before having to find the perfect image. I like to get students into the habit of getting basics working before they spend time on making it look better.

It takes five seconds with Inkscape to make a rectangle or oval image