Error CS1519

I'm getting the error message: Assets/Scripts/ButtonExecute.cs(10,25): error CS1519: Unexpected symbol `=' in class, struct, or interface member declaration. I've seen other posts where people got this from missing a semicolon, but I can't seem to find any spot like that. Here's the code: using UnityEngine; using UnityEngine.EventSystems; using System.Collections;

 public class ButtonExecute : MonoBehaviour {
 
     public float timeToSelect = 2.0f;
     private float countDown;
     private GameObject currentButton;
     private clicker = new Clicker ();
     
     void Update () {
         Transform camera = Camera.main.transform;
         Ray ray = new Ray (camera.position, camera.rotation * Vector3.forward);
         RaycastHit hit;
         GameObject hitButton = null;
         PointerEventData data = new PointerEventData (EventSystem.current);
         if (Physics.Raycast (ray, out hit)) {
             if (hit.transform.gameObject.tag == "Button") {
                 hitButton = hit.transform.parent.gameObject;
             }
         }
         if (currentButton != hitButton) {
             if (currentButton != null) {
                 ExecuteEvents.Execute<IPointerExitHandler> (currentButton, data, ExecuteEvents.pointerExitHandler);
             }
             currentButton = hitButton;
             if (currentButton != null) {
                 ExecuteEvents.Execute<IPointerExitHandler> (currentButton, data, ExecuteEvents.pointerEnterHandler);
                 countDown = timeToSelect;
             }
         }
         if (currentButton != null) {
             countDown -= Time.deltaTime;
             if (clicker.clicked () || countDown < 0.0f) {
                 ExecuteEvents.Execute<IPointerClickHandler> (currentButton, data, ExecuteEvents.pointerClickHandler);
                 countDown = timeToSelect;
             }
         }
     }
 }