Update example in README

Author: omerjerk

README.md

@@ -9,9 +9,12 @@ Capture cap;
 
 void setup() {
   size(720, 1280, P2D);
-  cap = new Capture(this);
-  String[] list = cap.list();
+  cap = new Capture(this, 720, 1280);
+  String[] list = Capture.list();
+  //Use this to print list of resolutions supported by the camera
   Capture.printCompatibleResolutionsList(cap);
+  cap.setCamera(list[0]);
+  cap.start();
 }
 
 void draw() {
@@ -20,4 +23,5 @@ void draw() {
 ```
 
 **Behind the hood :**
+
 The idea is to render camera preview on a `SurfaceTexture` and as soon as the new frame is received, copy the data from this `SurfaceTexture` to a custom texure bound to target `GL_TEXTURE_2D` (Note : We cannot directly render to a texture bound to `GL_TEXTURE_2D` target, because for the preview to happen, the texture must be bound to `GL_TEXTURE_EXTERNAL_OES`). This custom texture is then rendered to a PGraphics object. The backing texture of that PGraphics object is then used as the texture cache for our PImage file which stores the video.