Pause script errror.

I get this error: Assets/My Scripts/Pauser.js(3,18): BCE0044: expecting (, found ‘Pause’.

    function Start()
    {
        function Pause();    
    }
 
    function Pause() {
 
        while (true)
        {
            if (Input.GetKeyDown(KeyCode.P))
            {
                if (Time.timeScale == 0){
                Time.timeScale = 1;}
                
                
                else{ 
                Time.timeScale = 0;}
                
 
            }    
           
        }
   }

remove the word ‘function’ from before Pause