Switch to a graphics mode and draw an angled line on the screen using Javascript. You will end up having to learn: the basic HTML5 template, canvas element, a turtle-like drawing language. In qbasic,
That way they will also learn that - once they use anything else - impressive things have never been so gloriously easy to do ever since.
Javascript is good at many things ... but: There are countless examples of stuff in LEGO - fun stuff - that would take 10 to 100 times as much code to pull off. If possible at all.
