Time for action – commencing operation pie clock

Let's lay down some code to make those half-circle pieces rotate.

1. Set up a conditional statement so that we can draw different things before and after the halfway point:

     GUI.DrawTexture(clockRect, back, ScaleMode.StretchToFill, true,
      0);
      if(isPastHalfway)
      {
      } else {
      }
   

2. If we're not past halfway, rotate the GUI around the centerPoint. Draw the right side half-circle piece on top of the rotated GUI. Then, rotate the GUI back to its start position:

   if(isPastHalfway)
   {
   } else {
     GUIUtility.RotateAroundPivot(-rot, centerPoint);
     GUI.DrawTexture(clockRect, rightSide, ScaleMode.StretchToFill, true, 0);
     GUI.matrix = startMatrix;
   }

3. Save the script and test your game. You should see the right side half-circle piece rotating around the clock. But, we know it's not really rotating—the entire GUI is rotating, and we're stamping the image on the screen before resetting the rotation:

   

4. Draw the left half-circle once the GUI is back into position...