diff --git a/src/main/sarl/io/sarl/demos/fireworks/FireworksFXApplication.java b/src/main/sarl/io/sarl/demos/fireworks/FireworksFXApplication.java
deleted file mode 100644
index 47f0bc2..0000000
--- a/src/main/sarl/io/sarl/demos/fireworks/FireworksFXApplication.java
+++ /dev/null
@@ -1,41 +0,0 @@
-package io.sarl.demos.fireworks;
-
-import java.net.URL;
-
-import io.sarl.demos.fireworks.gui.FXMLViewerController;
-import javafx.application.Application;
-import javafx.fxml.FXMLLoader;
-import javafx.fxml.JavaFXBuilderFactory;
-import javafx.scene.Parent;
-import javafx.scene.Scene;
-import javafx.stage.Stage;
-
-public class FireworksFXApplication extends Application {
-	
-	private FXMLLoader loader;
-
-	@Override
-	public void start(Stage stage) throws Exception {
-		URL location = getClass().getResource("FireworksFXApplication.fxml");
-		loader = new FXMLLoader();
-		loader.setLocation(location);
-		loader.setBuilderFactory(new JavaFXBuilderFactory());
-		Parent root = (Parent) loader.load(location.openStream());
-		Scene scene = new Scene(root);
-		stage.setTitle("Firewoks sarl animation");
-		stage.setScene(scene);
-		stage.show();
-	}
-	
-	public static void main(String[] args) {
-		launch(args);
-	}
-	
-	@Override
-	public void stop() throws Exception {
-		// TODO Auto-generated method stub
-		super.stop();
-		((FXMLViewerController) loader.getController()).cleanExit();
-	}
-	
-}
\ No newline at end of file
diff --git a/src/main/sarl/io/sarl/demos/fireworks/FireworksFXApplication.sarl b/src/main/sarl/io/sarl/demos/fireworks/FireworksFXApplication.sarl
new file mode 100644
index 0000000..2d13838
--- /dev/null
+++ b/src/main/sarl/io/sarl/demos/fireworks/FireworksFXApplication.sarl
@@ -0,0 +1,39 @@
+package io.sarl.demos.fireworks
+
+import io.sarl.demos.fireworks.gui.FXMLViewerController
+import java.net.URL
+import javafx.application.Application
+import javafx.fxml.FXMLLoader
+import javafx.fxml.JavaFXBuilderFactory
+import javafx.scene.Parent
+import javafx.scene.Scene
+import javafx.stage.Stage
+
+class FireworksFXApplication extends Application {
+
+	private var loader : FXMLLoader
+
+	@Override
+	public def start(stage: Stage) throws Exception {
+		var location : URL  = getClass().getResource("FireworksFXApplication.fxml");
+		loader = new FXMLLoader();
+		loader.setLocation(location);
+		loader.setBuilderFactory(new JavaFXBuilderFactory());
+		var root : Parent = loader.load(location.openStream()) as Parent;
+		var scene : Scene = new Scene(root);
+		stage.setTitle("Firewoks sarl animation");
+		stage.setScene(scene);
+		stage.show();
+	}
+
+	public static def main(args: String[]) {
+		launch(args);
+	}
+
+	@Override
+	public def stop() throws Exception {		
+		super.stop();
+		(loader.getController() as FXMLViewerController).cleanExit();
+	}
+	
+}