[ASK] Unity Block Pulse Diagram

I have a problem. In Unity I want to make a pulse block graph like image below.

I am using this tutorial as the basis http://catlikecoding.com/unity/tutorials/graphs/

But as until now the code that I made only capable of making the upper and bottom part, like in this video http://www.youtube.com/watch?v=G2jTR6yGyzM&feature=youtu.be

So anybody know how I can make the side part (the height of the graph)? :)

Here is the little piece of the code:

 private float Sine(float x){
     float formula = Mathf.PI * x * graphW / graphF + Time.timeSinceLevelLoad;
     float sinFormula = Mathf.Sin(formula);
     if(sinFormula > 0){
         sinFormula = 1;    
     }
     else if(sinFormula < 0){
         sinFormula = -1;
     }
     return (sinFormula / graphH);
 }

Here is the code if you want to check http://pastebin.com/5yVcHWM4

Thank you very much :)