Here is a scratch VPGL IDE for your feel-free trial.
CAUTION:
Reloading this page will revert to the scratch state and lost all your unsaved work. It is strongly recommend to save your work periodically.
HOW TO USE: see here.
HOW TO PLAY (edit, load, save, run) : see here(UC)
SOME EXAMPLES: see here(UC)
EXERCISES (challenge if you like): see here(UC)