My Health Script Won't work in C#

I'm trying to convert my Javascript to C# but it won't work.

Javascript:

 var backgroundTexture : Texture; //input image lftTop4
 var foregroundTexture : Texture; //input image lftTop2
 var foregroundTexture2 : Texture; //input image lftTop3
 var frameTexture : Texture; //input image lftTop1
  
 var healthWidth: int = 52;
 var healthHeight: int = 234;
  
 var healthMarginLeft: int = 41;
 var healthMarginTop: int = -76;
  
  var manaWidth: int = 81;
 var manaHeight: int = 160;
  
 var manaMarginLeft: int = 25;
 var manaMarginTop: int = -39;
  
 var frameWidth : int = 195;
 var frameHeight: int = 195;
  
 var frameMarginLeft : int = -14;
 var frameMarginTop: int = -39;
  
 function OnGUI () {
  
     GUI.DrawTexture( Rect(frameMarginLeft,frameMarginTop, frameMarginLeft + frameWidth, frameMarginTop + frameHeight), backgroundTexture, ScaleMode.ScaleToFit, true, 0 );
  
     GUI.DrawTexture( Rect(healthMarginLeft,healthMarginTop,healthWidth + healthMarginLeft, healthHeight), foregroundTexture, ScaleMode.ScaleAndCrop, true, 0 );
  
  GUI.DrawTexture( Rect(manaMarginLeft,manaMarginTop,manaWidth + manaMarginLeft, manaHeight), foregroundTexture2, ScaleMode.ScaleAndCrop, true, 0 );
  
     GUI.DrawTexture( Rect(frameMarginLeft,frameMarginTop, frameMarginLeft + frameWidth,frameMarginTop + frameHeight), frameTexture, ScaleMode.ScaleToFit, true, 0 );
  
 }

Attempt at C# convert:

 using UnityEngine;
 using System.Collections;
 
 public class MYCLASSNAME : MonoBehaviour {
 Texture backgroundTexture; //input image lftTop4
 Texture foregroundTexture; //input image lftTop2
 Texture foregroundTexture2; //input image lftTop3
 Texture frameTexture; //input image lftTop1
  
 int healthWidth = 52;
 int healthHeight = 234;
  
 int healthMarginLeft = 41;
 int healthMarginTop = -76;
  
  int manaWidth = 81;
 int manaHeight = 160;
  
 int manaMarginLeft = 25;
 int manaMarginTop = -39;
  
 int frameWidth = 195;
 int frameHeight = 195;
  
 int frameMarginLeft = -14;
 int frameMarginTop = -39;
  
 void  OnGUI (){
  
     GUI.DrawTexture( new Rect(frameMarginLeft,frameMarginTop, frameMarginLeft + frameWidth, frameMarginTop + frameHeight), backgroundTexture, ScaleMode.ScaleToFit, true, 0 );
  
     GUI.DrawTexture( new Rect(healthMarginLeft,healthMarginTop,healthWidth + healthMarginLeft, healthHeight), foregroundTexture, ScaleMode.ScaleAndCrop, true, 0 );
  
  GUI.DrawTexture( new Rect(manaMarginLeft,manaMarginTop,manaWidth + manaMarginLeft, manaHeight), foregroundTexture2, ScaleMode.ScaleAndCrop, true, 0 );
  
     GUI.DrawTexture( new Rect(frameMarginLeft,frameMarginTop, frameMarginLeft + frameWidth,frameMarginTop + frameHeight), frameTexture, ScaleMode.ScaleToFit, true, 0 );
  
 }
 }