easeldemo.js

var pen = new Graphics(); // I find "graphics" vague, so I call it pen!  
stage = new Stage(canvas); // the display 
pen.setStrokeStyle(1).drawCircle(0,0,RADIUS); // not really drawn yet 
circle = new Shape(g); /* AHA now we have an object for the thing we haven't yet really drawn */
stage.addChild(circle); // Now it's drawn

// later on, we see the benefits of this cunning display
circle.x += 8; //  
stage.update();