Breaking text line in GUI.Box

Hello , friends , solved the problem of directing players to a website , this script works fine , but I have another problem , I can not break the lines of text in GUI.Box because the text and shown on a single line. please help me ... what should I add to this code. Thank you very much .

This is the script I have

 #pragma strict
 private var displayMessage : boolean;
 
 function OnTriggerEnter(other : Collider)
 {
     if(other.tag == "Player")
     {  //audio.clip = Sound;
        //audio.Play();
      
        displayMessage = true;
       
     }
 }
  
 function OnGUI()
 {
     if(displayMessage)
     
     {
        GUI.Box(Rect(200,100,Screen.width - 400, Screen.height - 200),"TEXT");
        
       if(GUI.Button(Rect(Screen.width/3 - 100,Screen.height - Screen.height/2.5,200,100),"APAGAR"))
        
      
         {
          displayMessage = false;
         }
         
        if(GUI.Button(Rect(Screen.width/3*2 - 100,Screen.height - Screen.height/2.5,200,100),"ENVIAR RESPOSTA"))
       
        {
          Application.OpenURL("http://www.marketfidelidade.com.br");
        }
     }
 }