Added new OpenGL examples for desktop

java/libraries/opengl/examples/Pixels/SetPixels/SetPixels.pde

@@ -0,0 +1,16 @@
+void setup() {
+  size(400, 400, P3D);
+
+  background(0);
+}
+
+void draw() {
+  for (int x = 0; x < width; x++) {
+    for (int y = 0; y < height; y++) {    
+      int c = color(random(255), random(255), random(255));
+      set(x, y, c);    
+    }
+  }
+    
+  println(frameRate);
+}