html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

var stage = acgraph.create('container');

​

var rectangle = stage.rect(25, 10, 120, 120);

​

// Sets radial gradient fill.

rectangle.fill(['black', 'white'], 0.5, 0.5, null, 0.9, 0.3, 0.81);