GroovyFX ColorfulCircles #kancon2011

gistfile1.gradle

import javafx.animation.Timeline;
import javafx.scene.effect.BoxBlur
import javafx.scene.paint.Color;
import javafx.scene.shape.StrokeType;

import groovyx.javafx.GroovyFX;
import groovyx.javafx.SceneGraphBuilder;
import groovyx.javafx.TimelineBuilder;

GroovyFX.start {stage->
	def circles = []
	new SceneGraphBuilder(stage).stage(width: 1024, height: 768, visible: true) {
		scene(fill: black){
			group(blendMode: 'overlay') {
				group {
					15.times{
						circles.add circle(
							fill: Color.web("white", 0.15),
							radius: 50,
							strokeType: StrokeType.OUTSIDE,
							stroke: Color.web("white", 0.45),
							strokeWidth: 4,
							translateX: Math.random() * stage.width,
							translateY: Math.random() * stage.height,
						){boxBlur(width: 10, height: 10, iterations: 3)}
					}
				}
				rectangle(width: stage.width, height: stage.height, fill: black)
				rectangle(width: stage.width, height: stage.height, fill: linearGradient(stops: [
					[0, Color.web("#f8db55")], [0.14, Color.web("#c0fe56")],
					[0.28, Color.web("#5dfbc1")], [0.43, Color.web("#64c2f8")],
					[0.57, Color.web("#be4af7")], [0.71, Color.web("#ed5fc2")],
					[0.85, Color.web("#ef504c")], [1, Color.web("#f2660f")]
				]))
			}
		}
	}
	
	new TimelineBuilder().timeline(cycleCount: Timeline.INDEFINITE, autoReverse: true) {
		circles.each {circle ->
			at (6000.ms){
				change(circle, 'translateX') {to Math.random() * stage.width}
				change(circle, 'translateY') {to Math.random() * stage.height}
				change(circle, 'radius') { to Math.random() * 300}
			}
		}
	}.play()
}