Here are some steps that might help:
- Learn to spell “pneumatics”
(1.5: never call a pneumatic cylinder a “piston”) - Use the search feature to look for “programming pneumatics”, and you’ll find articles like this one: Programming Pneumatics with VEXcode 1.0.1
- Follow @lacsap’s link: he beat me by a minute
- Be sure your hardware is connected right, too. In addition the the VEX stuff, here’s a useful paper: https://drive.google.com/file/d/1HLdEjg2xcbALeKR_u67Xit3hBY0AFEE1/view?usp=sharing
- Set up a small pneumatics circuit on the bench to learn how it all works before building it into your 'bot.