update light example

lights.js

@@ -1,23 +1,16 @@
-// Click and drag the mouse to view the scene from different angles.
-
 function setup () {
-
     document.oncontextmenu = () => false
     cvs = createCanvas(windowWidth, windowHeight, WEBGL)
-
-    describe('A white box drawn against a gray background.')
 }
 
 function draw () {
     background(50)
-    // Enable orbiting with the mouse.
+
     orbitControl()
 
-    // Turn on the lights.
     ambientLight(128, 128, 128)
     directionalLight(128, 128, 128, 0, 0, -1)
 
-    // Draw the box.
     box(50)
 
     //draw a plane under the box