BigEnemy script help

[xXVolvagiaXx]

I was looking for a way to make enemies bigger (making an octorock 2x2 instead of 1x1) and was given this script.

For some reason when I import it and go to compile it gives me a syntax error on line 14, expecting assign or semicolon on token {

I'm pretty new to scripting, so it's complete gibberish to me lol. I just copy/paste them into my games. Any help is greatly appreciated. :D

[xXVolvagiaXx]

Here's the script:

global script BigEnemies
{
    void run()
    {
        while(true)
        {
            ExtendEnemies();
            Waitframe();
        }
    }
    
    void ExtendEnemies
    {
        npc enemy;
        
        for(int i=Screen->NumNPCs(); i>0; i--)
        {
            enemy=Screen->LoadNPC(i);
            
            if(enemy->Extend==0 && enemy->Attributes[10]!=0)
            {
                if(enemy->Attributes[10]==1)
                    enemy->Extend=1;
                else if(enemy->Attributes[10]==2)
                    enemy->Extend=2;
            }
        }
    }
}