Well use Rand and Rnd functions! (and seedRnd as well) Then do some fancy math, apply it to 2D drawings/3D geometry and it's done! (look in the code archive for a start)
Honestly the question sounds like "How do I program graphic software?" and the answer to this question is certainly not "ask other people to do it", you'll have to learn from the tutorials, the examples or the code archives.
Honestly the question sounds like "How do I program graphic software?" and the answer to this question is certainly not "ask other people to do it", you'll have to learn from the tutorials, the examples or the code archives.