// create a CanvasAnimater object that targets a canvas element with id='myCanvas'
let canvasAnimater = new CanvasAnimater('myCanvas');

// flex the canvas to fill the entire window
canvasAnimater.flex(true);

// define and set a draw function with a time parameter that draws a black background and a white disk moving in a circle using Dwitter function names
canvasAnimater.draw = function (t) {
    
    let W = canvasAnimater.width;
    let H = canvasAnimater.height;
    
    // draw a black background
    x.fillStyle = R(0, 0, 0, 1);
    x.fillRect(0, 0, W, H); 
  
    // define a radius for the circular path the disk follows
    let D = Math.min(W,H)/4;
  
    // draw a white disk that moves in a circle  
    x.beginPath();
    x.arc(W/2 + D*S(t), H/2 - D*C(t), D/4, 0, 2*Math.PI);
    x.closePath();
    x.fillStyle = R(255, 255, 255, 1);
    x.fill();
 
}

// set Dwitter mode to create dwitter namespace
canvasAnimater.dwitterMode();

// set a time evolution range
canvasAnimater.evolve(0);

// set the render rate in frames-per-second
canvasAnimater.FPS(60);

// render the animation
canvasAnimater.animate();