Smart assistant animation

Code

var rootGroup = new Group()
var bg = new Path.Rectangle({
    size: view.size,
    position: view.center,
    fillColor: 'blue'
})
bg.sendToBack()

function drawCircle(x, y, scale, color) {
    var circle = new Path.Circle({
        radius: 4,
        center: [x, y],
        fillColor: {
            hue: x,
            saturation: 0.7,
            lightness: 0.7
        },
        opacity: 1,
        applyMatrix: false,
        blendMode: 'screen'
    })
    circle.scale(scale)
    circle.fillColor = color
    circle.bringToFront()
    circle.onFrame = function(event) {
        this.scaling += 0.3
        this.fillColor.hue += 3
    }
    var clone = circle.clone()
    clone.scaling += 20
    clone.fillColor = 'red'
    clone.blendMode = 'screen'
    clone.position.x += 20
    clone.position.y -= 20
    rootGroup.addChild(circle)
    rootGroup.addChild(clone)
}

function onFrame(event) {
    var x = view.center.x + Math.sin(event.count * 0.05 / 2) * 150
    var y = view.center.y + Math.sin(event.count * 0.05) * 70
    drawCircle(x, y, 1, 'yellow')
    rootGroup.children.map(function(object, i) {
        object.fillColor.hue += i * 0.01
        if (rootGroup.children.length > 600) {
            object.remove()
        }
    })
}