Bonsai is a JavaScript graphics library.
It’s at the heart of pixelplant.com and it’s what makes it tick.
Draw a 100×200 rectangle to the stage at {0,0}:
var r = new Rect(0, 0, 100, 200).addTo(stage);
Fill it:
r.fill(‘blue’);
Change your mind… Make it darker:
r.fill(color(‘green’).darker());
Animate it:
r.animate(‘400ms’, {
x: 50,
y: 50,
width: 200
});

Go and give B…