Character Resizing

using UnityEngine;
using System.Collections;

public class chracaterResizing : MonoBehaviour {

    public bool isBig = false;
    public bool isNormal = true;
    public bool isSmall = false;
    public bool isEnabled = false;

    public Transform character;

    public float bigSize = 10.259745f;
    public float normalSize = 4.259745f;
    public float smallSize = 2.259745f;

    void Update () {

        if (Input.GetKeyDown (KeyCode.RightBracket) && isEnabled == true && isNormal == true) {
            isNormal = false;
            isBig = true;
        }

        if (Input.GetKeyDown (KeyCode.RightBracket) && isEnabled == true && isSmall == true) {
            isSmall = false;
            isNormal = true;
        }

        if (Input.GetKeyDown (KeyCode.LeftBracket) && isEnabled == true && isBig == true) {
            isNormal = true;
            isBig = false;
        }

        if (Input.GetKeyDown (KeyCode.LeftBracket) && isEnabled == true && isNormal == true) {
            isNormal = false;
            isSmall = true;
        }


        if (character.GetComponent<characterController>().enabled == true) {
            isEnabled = true;
        }

        if (character.GetComponent<characterController>().enabled == false) {
            isEnabled = false;
        }

        if (isBig == true) {
            character.GetComponent<Transform>().localScale = new Vector3(bigSize, bigSize);
        }

        if (isNormal == true) {
            character.GetComponent<Transform>().localScale = new Vector3(normalSize, normalSize);
        }

        if (isSmall == true) {
            character.GetComponent<Transform>().localScale = new Vector3(smallSize, smallSize);
        }
    }
}