Need Help with rebuildable barricade system like in Call Of Duty Zombies

so this is what I need. I don't know much about programming stuff and need help with a script like this. Please don't get angry I just want ideas or suggestions about how can I make something like this. Tutorials or Examples accepted :D I really need some help. Thanks. Edit : Umm, I think i solved it myself but I am still having problems and i know what is my problem read the code please, i wrote something which will check barricade Health and teleport parts away. But as it is true it keeps teleporting parts away and i can't fix it. Edit2 : I solved that problem too, i still wonder if you can make a shorter version of this because this one lags a bit.

 #pragma strict //my old code
 @script RequireComponent( AudioSource )
 
 public var barricadeHealth : int = 0;
 
 public var thePlayer : Transform;
 
 public var theEnemy : Transform;
 
 public var barricade1a : Transform;
 
 public var barricade2a : Transform;
 
 public var barricade3a : Transform;
 
 public var barricade4a : Transform;
 
 public var barricade5a : Transform;
 
 var isBuilt : boolean = true;
 
 var canRepair : boolean = false;
 
 var attacking : boolean = false;
 
 var breaking : boolean = false;
 
 var canBreak : boolean = false;
  
 public var breakingSound : AudioClip;
 
 public var repairingSound : AudioClip;
  
 function Start() 
 {
     if ( thePlayer == null )
     {
        thePlayer = GameObject.Find( "Player" ).transform;
     }
     if ( theEnemy == null )
     {
        theEnemy = GameObject.Find( "Zombie" ).transform;
     }
 }
  
 function Update () {
 if (barricadeHealth<0)
 {
     barricadeHealth=0;
     isBuilt=false;
     breaking=false;
 } 
 if (barricadeHealth>0)
 {
     isBuilt=true;
 }
 if (breaking && canBreak)
 {
     Breaking();
 }
 if(isBuilt)
 
 {
     if(barricadeHealth>5)
     {
         barricadeHealth=5;
     }
     if(barricadeHealth==4)
     {
         
         barricade5a.transform.Translate(0,-10,0);
         if(Input.GetKeyUp(KeyCode.E) && isBuilt && canRepair)
         {
         barricade5a.transform.Translate(0,10,0);
         isBuilt = true;
         audio.PlayClipAtPoint( repairingSound, thePlayer.position );
         barricadeHealth+=1;
         }
     }
     if(barricadeHealth==3)
     {
         
         barricade4a.transform.Translate(0,-10,0);
         if(Input.GetKeyUp(KeyCode.E) && isBuilt && canRepair)
         {
         barricadeHealth+=1;
         isBuilt = true;
         audio.PlayClipAtPoint( repairingSound, thePlayer.position );
         barricade4a.transform.Translate(0,10,0);
         }
     }
     if(barricadeHealth==2)
     {
         
         barricade3a.transform.Translate(0,-10,0);
         if(Input.GetKeyUp(KeyCode.E) && isBuilt && canRepair)
         {
         barricadeHealth+=1;
         isBuilt = true;
         audio.PlayClipAtPoint( repairingSound, thePlayer.position );
         barricade3a.transform.Translate(0,10,0);
         }
     }
     if(barricadeHealth==1)
     {
         
         barricade2a.transform.Translate(0,-10,0);
         if(Input.GetKeyUp(KeyCode.E) && isBuilt && canRepair)
         {
         barricadeHealth+=1;
         isBuilt = true;
         audio.PlayClipAtPoint( repairingSound, thePlayer.position );
         barricade2a.transform.Translate(0,10,0);
         }
     }
 }
 if(!isBuilt)
     //if barricadeHealth equals 0
     barricade1a.transform.Translate(0,-10,0);
     if(Input.GetKeyUp(KeyCode.E) && !isBuilt && canRepair)
     {
         
         isBuilt = true;
         audio.PlayClipAtPoint( repairingSound, thePlayer.position );
         barricade1a.transform.Translate(0,10,0);
         barricadeHealth+=1;
     }
 }
 
 function OnTriggerEnter (other : Collider)
 {
         if(other.gameObject.name == "Player")
         {
                 canRepair = true;
                 if(other.gameObject.name == "Zombie")
                 {
                         breaking = true;
                 }
                 else
                 {
                         breaking = false;
                         attacking = true;
                 }
         }
 }
  
 function OnTriggerExit (other : Collider)
 {
         if(other.gameObject.name == "Player")
         {
                 canRepair = false;
                 if(other.gameObject.name == "Zombie")
                 {
                     breaking = false;
                 }
                 else
                 {
                     breaking = true;
                     attacking = false;
                 }
         }
 }
 
 function Breaking()
 {
     canBreak=false;
     yield WaitForSeconds (5);
     barricadeHealth-=1;
     audio.PlayClipAtPoint( breakingSound, theEnemy.position );
     canBreak=true;
     if (barricadeHealth>0)
     {
     isBuilt=true;
     }
 }

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

 #pragma strict 
 //new working code

 @script RequireComponent( AudioSource )
 
 public var barricadeHealth : int = 0;
 
 public var thePlayer : Transform;
 
 public var theEnemy : Transform;
 
 public var barricade1a : Transform;
 
 public var barricade2a : Transform;
 
 public var barricade3a : Transform;
 
 public var barricade4a : Transform;
 
 public var barricade5a : Transform;
 
 var isBuilt : boolean = true;
 
 var canRepair : boolean = false;
 
 var attacking : boolean = false;
 
 var breaking : boolean = false;
 
 var canBreak : boolean = false;
  
 public var breakingSound : AudioClip;
 
 public var repairingSound : AudioClip;
  
 var barricadeDown1a : boolean = false;
 
 var barricadeDown2a : boolean = false;
 
 var barricadeDown3a : boolean = false;
 
 var barricadeDown4a : boolean = false;
 
 var barricadeDown5a : boolean = false;
 
 function Start() 
 {
     isBuilt = true;
     barricadeDown1a = false;
     
     if ( thePlayer == null )
     {
        thePlayer = GameObject.Find( "Player" ).transform;
     }
     if ( theEnemy == null )
     {
        theEnemy = GameObject.Find( "Zombie" ).transform;
     }
 }
  
 function Update () {
 if (barricadeHealth<0 || barricadeHealth==0)
 {
     barricadeHealth=0;
     isBuilt=false;
     breaking=false;
     
     //note that there is no barricadeDown1a = true; because it causes a bug in script
 
     barricadeDown2a = true;
 
     barricadeDown3a = true;
 
     barricadeDown4a = true;
         
     barricadeDown5a = true;
 } 
 if (barricadeHealth>0)
 {
     isBuilt=true;
 }
 if (breaking && canBreak)
 {
     Breaking();
 }
 if(isBuilt)
 
 {
     if(barricadeHealth>5 || barricadeHealth==5)
     {
         barricadeHealth=5;
         
         barricadeDown1a = false;
 
         barricadeDown2a = false;
 
         barricadeDown3a = false;
 
         barricadeDown4a = false;
         
         barricadeDown5a = false;
     }
     if(barricadeHealth==4)
     {
         barricadeDown1a = false;
 
         barricadeDown2a = false;
 
         barricadeDown3a = false;
 
         barricadeDown4a = false;
         if (!barricadeDown5a)
         {
             barricade5a.transform.Translate(0,-10,0);
             barricadeDown5a = true;
         }
         if(Input.GetKeyUp(KeyCode.E) && isBuilt && canRepair)
         {
         barricade5a.transform.Translate(0,10,0);
         isBuilt = true;
         audio.PlayClipAtPoint( repairingSound, thePlayer.position );
         barricadeHealth+=1;
         }
     }
     if(barricadeHealth==3)
     {
         barricadeDown1a = false;
 
         barricadeDown2a = false;
 
         barricadeDown3a = false;
         
         barricadeDown5a = true;
         
         if (!barricadeDown4a)
         {
             barricade4a.transform.Translate(0,-10,0);
             barricadeDown4a = true;
         }
         if(Input.GetKeyUp(KeyCode.E) && isBuilt && canRepair)
         {
         barricadeHealth+=1;
         isBuilt = true;
         audio.PlayClipAtPoint( repairingSound, thePlayer.position );
         barricade4a.transform.Translate(0,10,0);
         }
     }
     if(barricadeHealth==2)
     {
         barricadeDown1a = false;
 
         barricadeDown2a = false;
         
         barricadeDown4a = true;
         
         barricadeDown5a = true;
 
         if (!barricadeDown3a)
         {
             barricade3a.transform.Translate(0,-10,0);
             barricadeDown3a = true;
         }
         
         if(Input.GetKeyUp(KeyCode.E) && isBuilt && canRepair)
         {
         barricadeHealth+=1;
         isBuilt = true;
         audio.PlayClipAtPoint( repairingSound, thePlayer.position );
         barricade3a.transform.Translate(0,10,0);
         }
     }
     if(barricadeHealth==1)
     {
         barricadeDown1a = false;
         
         barricadeDown3a = true;
 
         barricadeDown4a = true;
         
         barricadeDown5a = true;
         
         if (!barricadeDown2a)
         
         {
             barricade2a.transform.Translate(0,-10,0);
             barricadeDown2a = true;
         }
 
         if(Input.GetKeyUp(KeyCode.E) && isBuilt && canRepair)
         {
         barricadeHealth+=1;
         isBuilt = true;
         audio.PlayClipAtPoint( repairingSound, thePlayer.position );
         barricade2a.transform.Translate(0,10,0);
         }
     }
 }
 if(!isBuilt)
     //if barricadeHealth equals 0
     if (!barricadeDown1a)
     {
         barricade1a.transform.Translate(0,-10,0);
         barricadeDown1a = true;
     }
     if(Input.GetKeyUp(KeyCode.E) && !isBuilt && canRepair)
     {
     
         isBuilt = true;
         audio.PlayClipAtPoint( repairingSound, thePlayer.position );
         barricade1a.transform.Translate(0,10,0);
         barricadeHealth+=1;
     }
 }
 
 function OnTriggerEnter (other : Collider)
 {
         if(other.gameObject.name == "Player")
         {
                 canRepair = true;
                 if(other.gameObject.name == "Zombie")
                 {
                         breaking = true;
                 }
                 else
                 {
                         breaking = false;
                         attacking = true;
                 }
         }
 }
  
 function OnTriggerExit (other : Collider)
 {
         if(other.gameObject.name == "Player")
         {
                 canRepair = false;
                 if(other.gameObject.name == "Zombie")
                 {
                     breaking = false;
                 }
                 else
                 {
                     breaking = true;
                     attacking = false;
                 }
         }
 }
 
 function Breaking()
 {
     canBreak=false;
     yield WaitForSeconds (5);
     barricadeHealth-=1;
     audio.PlayClipAtPoint( breakingSound, theEnemy.position );
     canBreak=true;
 }