3D Combo system?

I looked up few scripts before asking his question but I coludn't do it. I can't even play the first animation. Any help would be appreciated.

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class combo : MonoBehaviour {

 Animator animator;//You may not need an animator, but if so declare it here   

 int noOfClicks; //Determines Which Animation Will Play
 bool canClick; //Locks ability to click during animation event

 void Start()
 {
     //Initialize appropriate components
     animator = GetComponent<Animator>();

     noOfClicks = 0;
     canClick = true;
 }

 void Update()
 {
     if (Input.GetMouseButtonDown(0)) { ComboStarter(); }
 }

 void ComboStarter()
 {
     if (canClick)
     {
         noOfClicks++;
     }

     if (noOfClicks == 1)
     {
         animator.SetInteger("condition", 30);
     }
 }

 public void ComboCheck()
 {

     canClick = false;

     if (animator.GetCurrentAnimatorStateInfo(0).IsName("Attack1") && noOfClicks == 1)
     {//If the first animation is still playing and only 1 click has happened, return to idle
         animator.SetInteger("animation", 0);
         canClick = true;
         noOfClicks = 0;
     }
      if (animator.GetCurrentAnimatorStateInfo(0).IsName("Attack1") && noOfClicks >= 2)
     {//If the first animation is still playing and at least 2 clicks have happened, continue the combo          
         animator.SetInteger("condition", 31);
         canClick = true;
     }
      if (animator.GetCurrentAnimatorStateInfo(0).IsName("Attack2") && noOfClicks == 2)
     {  //If the second animation is still playing and only 2 clicks have happened, return to idle         
         animator.SetInteger("condition", 0);
         canClick = true;
         noOfClicks = 0;
     }
      if (animator.GetCurrentAnimatorStateInfo(0).IsName("Attack2") && noOfClicks >= 3)
     {  //If the second animation is still playing and at least 3 clicks have happened, continue the combo         
         animator.SetInteger("condition", 32);
         canClick = true;
     }
      if (animator.GetCurrentAnimatorStateInfo(0).IsName("Attack3"))
     { //Since this is the third and last animation, return to idle          
         animator.SetInteger("condition", 0);
         canClick = true;
         noOfClicks = 0;
     }
 }

}