CursorAnim.cs (28,17): error CS0029: Can not implicitly convert type 'bool' to `UnityEngine.Texture2D '

I get this error. I want to turn it off 2 Texture2D different.

When I press the left mouse button to activate the mouse cursor component (Texture2D) and when the release button to trigger another (textured2d).

how to fix the error CS0029: Can not implicitly convert type 'bool' to `UnityEngine.Texture2D '

script reference:

 using UnityEngine;
 using System.Collections;
 
 public class CursorAnim : MonoBehaviour {
 
     public Texture2D cursoropen;
     public Texture2D cursorclose;
     public Vector2 mouse;
     public int w = 32;
     public int h = 32;
 
 
     void Start()
     {
         Screen.showCursor = false;
         }
 
 
     void Update()
     {
         if (Input.GetMouseButtonDown (0))
         
 
         cursorclose = true;
         cursoropen = false;
         
         if (Input.GetMouseButtonUp (0))
         
         {
         cursoropen = true;
         cursorclose = false;
         }
 
         mouse = new Vector2(Input.mousePosition.x, Screen.height - Input.mousePosition.y);
     
     }
     
     void OnGUI()
     {
         GUI.DrawTexture(new Rect(mouse.x - (w / 2), mouse.y - (h / 2), w, h), cursoropen = cursorclose);
     }
 
 }