Step-by-step explanation:
MU Graphics is a persistent-object graphics package, meaning that it allows you to draw shapes on the screen using Python, and those shapes will stay on the screen until they are removed.
Here is an example. Click the green run button to draw a rectangle and circle. You can also change the code and run again to see your changes!
Shapes can be changed or interacted with by using the built-in event functions, like so.