How to start to develop a GUI (Graphical User Interface) for beginners (example: Tic Tac Toe)

You’re watching a piece of early GUI history: Bill Atkinson (Mac team; creator of the QuickDraw graphics system and the MacPaint app) showing how drawing tools worked on the original Macintosh, including an early on-screen eraser. Pulled from the full Macintosh introduction event at the Boston Computer Society, recorded on Jan. 30, 1984. | Computer History Museum