Autocast

private function onAutocast takes Tower tower returns nothing
    local integer  lvl = tower.getLevel()
    local Iterate inRange = Iterate.overUnitsInRangeOfCaster(tower,TARGET_TYPE_CREEPS,875) //Can set this at the start.
    local Unit next //Used as next during the iterate and the unit to affect during the other loop.
    local integer indexCounter = 0
    local integer loopCounter = 3
    local integer counter = 1

    loop
        set next=inRange.next()
        exitwhen next==0
        set resultArray[indexCounter] = next
        set indexCounter = indexCounter+1
    endloop
   
    if(indexCounter > 0) then //Commented lines here are for setting the period to a low time when no creeps are around,
                              //remove them if you don't want this to happen. Also if these lines are used, the On Level
                              //Up code isn't needed.
        loop
            set loopCounter = loopCounter - 1
            set next = resultArray[GetRandomInt(0,indexCounter-1)]
            call tower.doSpellDamage(next,(200+lvl*12)*counter,tower.calcSpellCritNoBonus())
            call SFXAtUnit("Abilities\\Spells\\Items\\AIre\\AIreTarget.mdl",next.getUnit())
            set counter = counter + 1
            exitwhen loopCounter == 0
        endloop
    
    endif
    
endfunction

Header

    globals
    Unit array resultArray //Instead of numResults, use a resultArray so you only have to iterate once.
    endglobals
    
    //Do not remove or rename this function!
    //Put your initialization tasks here, this function will be called on map init
    private function init takes nothing returns nothing
    endfunction