Need help displaying score (JavaScript)

I have created a basically finished game that can be played by the blind (there is no graphics). However, as I have been testing it, I have realized that I would like to make this game more enjoyable to those who aren’t blind and add a few visual stuff. What I want to do is in the top left (or right, doesn’t matter) corner of the screen I want the current score to be displayed. (currently all that happens is the score is read out as audio every so often).

Since this is my first unity project and I haven’t used any of the GUI and visual aspects of unity, I don’t know how to do this. After some research I think I need to do something like this. What I have currently is

function score() {
	distanceScore += (Variables.actualFps + 88) / 5280;	//distanceScore is my score
	GUI.Box(new Rect (10,10,100,20),distanceScore); //this is what I assumed would display the score
}

InvokeRepeating("score",1,1); //this is how the score is refreshed and displayed.

the OnGUI function is where u want to do all this.