Write your own GPC script and have it checked against the PLHVM standard — the same rules taught in the course.
Honest note: this can't run your script — GPC only runs on the actual Zen. What it does is read your code and catch the mistakes that break scripts, then hold it to the PLHVM standard. Compile and test on your Zen before you trust it.
PLHVM CODE LAB · CHECKED AGAINST THE PLHVM STANDARD