JavaFX - srce animacija

Code:

package srce;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.ShapeIntersect;
import javafx.scene.effect.Reflection;
import javafx.scene.paint.LinearGradient;
import javafx.scene.paint.Stop;

def shapeintersect = ShapeIntersect {
    a:
        Circle {
            centerX: 60
            centerY: 60
            radius: 30
            fill: Color.YELLOW
            opacity: 0.5
        }
    b: [
        Circle {
            centerX: 45
            centerY: 85.98
            radius: 30
            fill: Color.INDIANRED
            opacity: 0.5
        },
        Circle {
            centerX: 75
            centerY: 85.98
            radius: 30
            fill: Color.BLUE
            opacity: 0.5
        }
     ]
     fill: LinearGradient {
            startX: 0.5, startY: 0.0, endX: 1.0, endY: 1.0
            proportional: true
            stops: [
                Stop { offset: 0.0 color: Color.CRIMSON }
                Stop { offset: 1.0 color: Color.DARKRED }
            ]
        }
    
}

Stage {
    title: "Srce"
    scene: Scene {
        width: 190
        height: 250
        content: shapeintersect
    }
}