[Scripting Question] Thunderstorm Weather

[Rainsis]

Y have created a weather effect that damages everyone in the battlefield by 1/3hp every turn.

-Pokemon with Electric or Ground type are not affected.
-Pokemon with LightningRod or VoldAbsorb abilities are not affected.
-Pokemon with Flying,Water or Steel types are damaged by 1/2hp instead of 1/3hp.

But i wanted to make that the damage effect only applies each 2 turns. How can i do that?


These are my changes:

Spoiler:

Changes are in red
In the PBWeather

begin
  module PBWeather
    SUNNYDAY    = 1
    RAINDANCE   = 2
    SANDSTORM   = 3
    HAIL        = 4
    HARSHSUN    = 5
    HEAVYRAIN   = 6
    STRONGWINDS = 7
    [COLOR="Red"]THUNDERSTO  = 9[/COLOR]

In the PokeBattle_Battle

elsif @weather==PBWeather::HAIL
      pbCommonAnimation("Hail",nil,nil)
      pbDisplay(_INTL("Hail is falling.")
[COLOR="Red"]elsif @weather==PBWeather::THUNDERSTO
      pbCommonAnimation("Rain",nil,nil)
      pbDisplay(_INTL("You are under a thunderstorm"))[/COLOR]

And in the same script right before "when PBWeather::HEAVYRAIN"

 [COLOR="Red"]     #----------THUNDERSTORM------------
    when PBWeather::THUNDERSTO
      @weatherduration=@weatherduration-1 if @weatherduration>0
      if @weatherduration==0
        pbDisplay(_INTL("The thunder storm stopped."))
        @weather=0
        PBDebug.log("[End of effect] Thunder weather ended")
      else
        pbCommonAnimation("Rain",nil,nil)
#        pbDisplay(_INTL("The thunderstorm continues falling."))
        if pbWeather==PBWeather::THUNDERSTO
          PBDebug.log("[Lingering effect triggered] Thunderstorm damage")
          for i in priority
            next if i.isFainted?
            if !i.pbHasType?(:ELECTRIC) &&
               !i.pbHasType?(:GROUND) &&
               !i.hasWorkingAbility(:LIGHTNINGROD) &&
               !i.hasWorkingAbility(:VOLTABSORB) &&
               ![0xCA,0xCB].include?(PBMoveData.new(i.effects[PBEffects::TwoTurnAttack]).function) # Dig, Dive
              @scene.pbDamageAnimation(i,0)
              if !i.pbHasType?(:WATER) &&
                 !i.pbHasType?(:FLYING) &&
                 !i.pbHasType?(:STEEL)
                 i.pbReduceHP((i.totalhp/3).floor)
                 pbDisplay(_INTL("{1} is hitted by a thunder!",i.pbThis))
               else  
               i.pbReduceHP((i.totalhp/2).floor)
               pbDisplay(_INTL("{1} is hitted by a thunder!",i.pbThis))
              if i.isFainted?
                return if !i.pbFaint
              end
             end 
            end
          end
        end
    end[/COLOR]

I have already tested it and it seems to works as i described.