diff --git a/src/application/Main.java b/src/application/Main.java
index 0ad67cf..23a304a 100644
--- a/src/application/Main.java
+++ b/src/application/Main.java
@@ -3,22 +3,31 @@ package application;
 import javafx.application.Application;
 import javafx.stage.Stage;
 import javafx.scene.Scene;
-//import javafx.scene.layout.BorderPane;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Alert.AlertType;
 
 public class Main extends Application {
 	public void start(Stage primaryStage) {
 		try {
-			RootGridPane root = new RootGridPane(); // BorderPane machen und wahrscheinlich FlowPane
-			// BorderPane root = new BorderPane();
+			RootGridPane root = new RootGridPane();
 			Scene scene = new Scene(root, 400, 400);
+
+			primaryStage.setTitle("Erstes Fenster");
 			primaryStage.setScene(scene);
-			primaryStage.setTitle("GUI Übung 2");
 			primaryStage.show();
+
 		} catch (Exception e) {
-			e.printStackTrace();
+			e.getStackTrace();
 		}
 	}
 
+	public static void showAlert(String message) {
+		Alert alert = new Alert(AlertType.INFORMATION, message);
+		alert.setHeaderText(null);
+		alert.setTitle(null);
+		alert.showAndWait();
+	}
+
 	public static void main(String[] args) {
 		launch(args);
 	}
diff --git a/src/application/RootGridPane.java b/src/application/RootGridPane.java
index 4c68136..bf5e7a7 100644
--- a/src/application/RootGridPane.java
+++ b/src/application/RootGridPane.java
@@ -1,43 +1,114 @@
 package application;
 
+import javafx.application.Platform;
+import javafx.event.ActionEvent;
+import javafx.event.EventHandler;
+import javafx.geometry.HPos;
 import javafx.geometry.Insets;
-import javafx.scene.control.RadioButton;
-import javafx.scene.control.ToggleGroup;
+import javafx.geometry.Pos;
+import javafx.geometry.VPos;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.layout.FlowPane;
 import javafx.scene.layout.GridPane;
 
 public class RootGridPane extends GridPane {
 
-//	Button btButton1;
-//	Button btLaden;
-//	Button btSpeichern;
-
-	private RadioButton radbtLeft, radbtCenter, radbtRight;
+	private Button btButton1, btLaden, btBeenden;
+	private Button btButton4, btButton5, btButton6, btButtonSieben, btButtonAcht;
+	private Button btBack, btBack2;
+	private Label lbErsetzt;
+	private FlowPane fpRechtsUnten;
 
 	public RootGridPane() {
 		initComponents();
 		addComponents();
+		addHandler();
 	}
 
 	public void initComponents() {
-		
-		radbtLeft = new RadioButton("");
-			radbtLeft.setPadding(new Insets(10));
-		
-		
-		radbtCenter = new RadioButton("");
-			radbtCenter.setPadding(new Insets(10));
-			
-		
-		radbtRight = new RadioButton("");
-			radbtRight.setPadding(new Insets(10));
-			
+		btButton1 = new Button("Button1");
+		btButton1.setPrefSize(100, 100);
+		btButton1.setAlignment(Pos.BOTTOM_RIGHT);
+
+		btLaden = new Button("Laden-Button");
+		btLaden.setPrefSize(200, 200);
+		btLaden.setAlignment(Pos.TOP_CENTER);
+
+		btBeenden = new Button("Beenden-Button");
+		btBeenden.setPrefSize(200, 200);
+		btBeenden.setAlignment(Pos.BOTTOM_LEFT);
+
+		btButton4 = new Button("Button4");
+		btButton5 = new Button("Button5");
+		btButton6 = new Button("Button6");
+		btButtonSieben = new Button("ButtonSieben");
+		btButtonAcht = new Button("ButtonAcht");
+
+		fpRechtsUnten = new FlowPane();
+		fpRechtsUnten.setPrefSize(200, 200);
+		fpRechtsUnten.getChildren().addAll(btButton4, btButton5, btButton6, btButtonSieben, btButtonAcht);
+		fpRechtsUnten.setAlignment(Pos.CENTER_LEFT);
+		fpRechtsUnten.setPadding(new Insets(10));
+		fpRechtsUnten.setVgap(10);
+		fpRechtsUnten.setHgap(10);
+
+		GridPane.setHalignment(btButton1, HPos.CENTER);
+		GridPane.setValignment(btButton1, VPos.BOTTOM);
+
 	}
 
 	public void addComponents() {
-
-		add(radbtLeft, 0, 0);
-		add(radbtCenter, 0, 0);
-		add(radbtRight, 0, 0);
-
+		add(btButton1, 0, 0);
+		add(btLaden, 1, 0);
+		add(btBeenden, 0, 1);
+		add(fpRechtsUnten, 1, 1);
 	}
+
+	private void addHandler() {
+
+		btBack = new Button("Back");
+		btBack2 = new Button("Back");
+		lbErsetzt = new Label("Ersetzt!");
+
+		btButton1.setOnAction(new EventHandler<ActionEvent>() {
+			public void handle(ActionEvent event) {
+				getChildren().remove(btButton1);
+				getChildren().add(btBack2);
+				Main.showAlert("Bin " + btButton1.getText());
+			}
+		});
+
+		btBack2.setOnAction(new EventHandler<ActionEvent>() {
+			public void handle(ActionEvent event) {
+				getChildren().remove(btBack2);
+				getChildren().add(btButton1);
+			}
+		});
+
+		btBack.setOnAction(new EventHandler<ActionEvent>() {
+			public void handle(ActionEvent event) {
+				fpRechtsUnten.getChildren().setAll(btButton4, btButton5, btButton6, btButtonSieben, btButtonAcht);
+			}
+		});
+
+		btButton4.setOnAction(new EventHandler<ActionEvent>() {
+			public void handle(ActionEvent event) {
+				fpRechtsUnten.getChildren().setAll(btBack);
+			}
+		});
+
+		btLaden.setOnAction(new EventHandler<ActionEvent>() {
+			public void handle(ActionEvent arg0) {
+				Main.showAlert("Loading in progress...");
+			}
+		});
+
+		btBeenden.setOnAction(event -> beenden());
+	}
+
+	private void beenden() {
+		Platform.exit();
+	}
+
 }