If this is for real...my advice to you for what it's worth...While he is having a seizure there is nothing you can do, but if he is standing up try to make sure he doesn't hit his head if he falls down.
After the seizure is over see if he responds to you, if he doesn't respond, try making him respond for a couple of minutes. If that doesn't work and he is unconscious let your parents know or call 911 if your parents aren't home. Also be aware there are different kinds of seizures.
I hope this helps. As I said if this is for real and you have any other questions about this let me know.
