Error with 6 line of code

I have no idea whats wrong here I have only 6 lines of code and im getting this error. This is the error: Assets/Scripts/Collisions.js(1,6): UCE0001: ‘;’ expected. Insert a semicolon at the end.

using UnityEngine.SceneManagement;

function OnCollisionEnter()



In Javascript, use

import UnityEngine.SceneManagement;

instead of

using UnityEngine.SceneManagement