Random Potion effect

[ZombiePigmanDude]

Title self explanatory, I want the skript to give the player a random potion effect when right clicking. Currently I'm not sure how to accomplish this, This is the code i have so far

on right click:
   if player is holding a stick named "&f&lCig":
       #Give player random potion effect?

Is there a way I could loop all potion effects and give player a random one, or would there be a simpler solution?
Any would be awesome

 

[Mattia]

on right click:
 if player is holding a stick:
  set {_num} to a random integer between 1 and {maxpotions}
  apply {%{_num}%.potion} 3 to the player
  send "You now have the %{%{_num}%.potion}% effect!" to player

command /potionadd <potion>:
 trigger:
  add 1 to {maxpotions}
  set {_currentpotion} to {maxpotion}
  set {%{_currentpotion}%.potion} to arg-1

I didn't add command permission or anything because I was lazy, and this is the best option that i have came up with. I haven't tested it in game but in the parser it says that it has no errors