import java.util.Random;
import javafx.animation.FadeTransition;
import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
import javafx.util.Duration;
/*

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                        http://gpusmackers.blogspot.in
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*/
public class JavaFX_23 extends Application {
    Group cir = new Group();
    @Override
    public void start(Stage stage) {
        AnchorPane root = new AnchorPane();
        Random rand = new Random();
        for(int i=0;i<50;i++)
        {
            int r = rand.nextInt(255);
            int g = rand.nextInt(255);
            int b = rand.nextInt(255);
            Circle c = new Circle(0.1, Color.rgb(r, g, b, 0.5));
            c.setCenterX(rand.nextInt(800));
            c.setCenterY(rand.nextInt(500));
            Timeline t = new Timeline();
            t.setCycleCount(Timeline.INDEFINITE);
            Duration d = Duration.seconds(rand.nextInt(30)+15);
            KeyValue kv = new KeyValue(c.radiusProperty(), rand.nextInt(100));
            KeyFrame kf = new KeyFrame(d, kv);
            t.getKeyFrames().add(kf);
            cir.getChildren().add(c);
            t.play();
        }
        root.getChildren().add(cir);
        Scene scene = new Scene(root, 800, 500, Color.BLACK);
        stage.setScene(scene);
        stage.setTitle("Dream Night Animation in JavaFX");
        stage.show();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }
    
}