Thanks. I'd missed the first one. The timelines are good, but what I mean by 'dynamic' is something with user input that affects objects. Its easy to show how

Thanks. I'd missed the first one. The timelines are good, but what I mean by 'dynamic' is something with user input that affects objects. Its easy to show how a loop can draw the same shape in lots of different ways, but what happens if the loop might draw different things depending on what the user inputs while the program is running? This gets tricky.