Update index.mdx

Signed-off-by: Arya Gupta <arya.gupta99999@gmail.com>

Author: Arya-Gupta

content/pages/environment/index.mdx

@@ -15,7 +15,7 @@ description: >
 
 The Processing Development Environment (PDE) makes it easy to write Processing programs. Programs are written in the Text Editor and started by pressing the Run button. In Processing, a computer program is called a _sketch_. Sketches are stored in the _Sketchbook_, which is a folder on your computer.
 
-Sketches can draw two- and three-dimensional graphics. The default renderer is for drawing two-dimensional graphics. The P3D renderer makes it possible to draw three-dimensional graphics, which include controlling the camera, lighting, and materials. The P2D renderer is a fast, but less accurate renderer for drawing two-dimensional graphics. Both the P2D and P3D renderers are accelerated if your computer has an OpenGL compatible graphics card.
+Sketches can draw two- and three-dimensional graphics. The default renderer is for drawing two-dimensional graphics. The P3D renderer makes it possible to draw three-dimensional graphics, which includes controlling the camera, lighting, and materials. The P2D renderer is a fast, but less accurate renderer for drawing two-dimensional graphics. Both the P2D and P3D renderers are accelerated if your computer has an OpenGL compatible graphics card.
 
 The capabilities of Processing are extended with _Libraries_ and _Tools_. Libraries make it possible for sketches to do things beyond the _core_ Processing code. There are hundreds of libraries contributed by the Processing community that can be added to your sketches to enable new things like playing sounds, doing computer vision, and working with advanced 3D geometry. Tools extend the PDE to help make creating sketches easier by providing interfaces for tasks like selecting colors.
 
@@ -99,7 +99,7 @@ Additional commands are found within the six menus: File, Edit, Sketch, Debug, T
   <dt>Preferences...</dt>
   <dd>
     Change some of the ways Processing works. (This item is located in the
-    Processing menu on Mac OS X.)
+    Processing menu on Mac OS.)
   </dd>
   <dt>Quit</dt>
   <dd>