Draw a rectangle with borders

Hello, everyone.

I'm trying to tinker with drawing GUI in order to create a grid system and while I found out how to draw a rectangle, I want to know if there is something I can do to add a border to the edges of the rectangle. Like a red rectangle, but the edges are colored black.

How do I do it?

Extra question:

This is my code, based on something dug on another topic:

Code (CSharp):

1. public static void GUIDrawRect( Rect position, Color color )
2.     {
3.         if( _staticRectTexture == null )
4.         {
5.             _staticRectTexture = new Texture2D( 1, 1 );
6.         }
7.        
8.         if( _staticRectStyle == null )
9.         {
10.             _staticRectStyle = new GUIStyle();
11.         }
12.        
13.         _staticRectTexture.SetPixel( 0, 0, color );
14.         _staticRectTexture.Apply();
15.        
16.         _staticRectStyle.normal.background = _staticRectTexture;
17.        
18.         GUI.Box( position, GUIContent.none, _staticRectStyle );
19.        
20.        
21.     }

While this would draw the rectangle to the game screen, it's not on the Scene. How do I make it appear on Scene? Or is it impossible, or that the only way I can make grids/panels like that is to use a self-created object myself?