progress with the rotation system but still not finished , it works tho

Piece/src/application/Piece.java

@@ -1,10 +1,17 @@
 package application;  
 import javafx.application.Application;
+import javafx.event.Event;
+import javafx.event.EventHandler;
 import javafx.scene.Group;  
 import javafx.scene.Scene;
+import javafx.scene.input.KeyEvent;
+import javafx.scene.input.KeyCode;
 import javafx.scene.paint.Color;  
 import javafx.scene.shape.Polygon;
+import javafx.scene.transform.Rotate;
+import javafx.animation.RotateTransition;
 import javafx.stage.Stage;
+import javafx.util.Duration;
 public class Piece extends Application{
 	
 	public void start(Stage primaryStage) throws Exception {
@@ -18,15 +25,54 @@ public class Piece extends Application{
 				 100.0,100.0,
 				 0.0,100.0});
 		
-		 piece1.setFill(Color.LIMEGREEN);
-		 piece1.setStroke(Color.BLACK);
-		 
 		Group root = new Group();  
         root.getChildren().addAll(piece1);  
         Scene scene = new Scene(root,490,450,Color.WHEAT);  
         primaryStage.setScene(scene);  
         primaryStage.setTitle("piece 1");  
         primaryStage.show(); 
+		
+		
+		 
+		 piece1.setFill(Color.LIMEGREEN);
+		 piece1.setStroke(Color.BLACK);
+		 piece1.setStrokeWidth(3);
+		 		 
+		 
+		//Instantiating RotateTransition class to create the animation (rotation to the right)
+		 RotateTransition rotaterght = new RotateTransition();
+		//setting attributes for the RotateTransition  
+		 rotaterght.setByAngle(90);
+		 rotaterght.autoReverseProperty();
+		 rotaterght.setDuration(Duration.millis(1000));
+		 rotaterght.setNode(piece1);
+		 rotaterght.setAxis(Rotate.Z_AXIS);
+		 
+		//Instantiating RotateTransition class to create the animation (rotation to the left)
+		 RotateTransition rotatelft = new RotateTransition();
+			//setting attributes for the RotateTransition  
+		 rotatelft.setByAngle(-90);
+		 rotatelft.autoReverseProperty();
+		 rotatelft.setDuration(Duration.millis(1000));
+		 rotatelft.setNode(piece1);
+		 rotatelft.setAxis(Rotate.Z_AXIS);
+		 
+		 
+		 
+		 scene.setOnKeyPressed(new EventHandler<KeyEvent>() {
+			 
+			 public void handle(KeyEvent event) {// 'event' means corresponds to clicking on the clipboard
+				 switch (event.getCode()) {// 'getCode' gets the code of the key pressed on the clipboard
+				 case RIGHT: rotaterght.play();   break;
+				 case LEFT: rotatelft.play();  break;
+				 default: System.out.println("this case hasn't been taken in charge yet");
+				 
+				 }
+			 }
+		 });
+		 
+		
+		 
 	}
 	
 	public static void main(String[] args) {