UCE0001: ';' excpected. Insert a semicolon at the end. There is a semicolon on the end

The error says:
(4, 6) Please Help Thanks

//SceneManagemnet import
Using UnityEngine.SceneManagement;

//Input Checks

	function OnTriggerEnter(Collider) {
		if(Input.GetMouseButtonDown(0)) {
			Debug.Log("Loading Scene level_selector");
			SceneManager.LoadScene("load_Selector", LoadSceneMode.Single);


If you are trying to write UnityScript, write ‘import’ instead of ‘Using’. If this is C#, write ‘using’ instead of ‘Using’ and ‘void OnTriggerEnter’