diff --git a/src/org/ntlab/actions/StartAnimationAction.java b/src/org/ntlab/actions/StartAnimationAction.java
index 852f6db..c065303 100644
--- a/src/org/ntlab/actions/StartAnimationAction.java
+++ b/src/org/ntlab/actions/StartAnimationAction.java
@@ -12,10 +12,6 @@
 
 	@Override
 	public void actionPerformed(ActionEvent e) {
-		new Thread() {
-			public void run() {
-				magnetRON.startAnimation();						
-			}
-		}.start();
+		magnetRON.startAnimation();						
 	}
 }
diff --git a/src/org/ntlab/actions/StopAnimationAction.java b/src/org/ntlab/actions/StopAnimationAction.java
new file mode 100644
index 0000000..6372c4f
--- /dev/null
+++ b/src/org/ntlab/actions/StopAnimationAction.java
@@ -0,0 +1,17 @@
+package org.ntlab.actions;
+
+import java.awt.event.ActionEvent;
+
+import org.ntlab.deltaViewer.IMagnetRON;
+
+public class StopAnimationAction extends AbstractMagnetRONAction {
+
+	public StopAnimationAction(IMagnetRON magnetRON) {
+		super("�I��", magnetRON);
+	}
+
+	@Override
+	public void actionPerformed(ActionEvent e) {
+		magnetRON.stopAnimation();						
+	}
+}
diff --git a/src/org/ntlab/deltaViewer/IMagnetRON.java b/src/org/ntlab/deltaViewer/IMagnetRON.java
index a00a0ee..04a34dd 100644
--- a/src/org/ntlab/deltaViewer/IMagnetRON.java
+++ b/src/org/ntlab/deltaViewer/IMagnetRON.java
@@ -1,15 +1,21 @@
 package org.ntlab.deltaViewer;
 
 import java.io.File;
+import java.util.List;
 
 import org.ntlab.featureExtractor.Feature;
 
 public interface IMagnetRON {
 
-	void open(File file);
+	List<Feature> open(File file);
 
 	void doExtract(Feature feature);
 
 	void startAnimation();
 
+	void pauseAnimation();
+	
+	void resumeAnimation();
+	
+	void stopAnimation();
 }
\ No newline at end of file
diff --git a/src/org/ntlab/deltaViewer/MagnetRONFrame.java b/src/org/ntlab/deltaViewer/MagnetRONFrame.java
index c518e35..ea290a2 100644
--- a/src/org/ntlab/deltaViewer/MagnetRONFrame.java
+++ b/src/org/ntlab/deltaViewer/MagnetRONFrame.java
@@ -41,8 +41,9 @@
 	private Map<String, String[]> argsMap = new HashMap<>();
 	private IObjectCallGraph objectCallGraph;
 	private IAliasCollector aliasCollector;
+	private Thread animationThread;
 	
-public MagnetRONFrame() throws HeadlessException {
+	public MagnetRONFrame() throws HeadlessException {
 		super(WINDOW_TITLE);
 		setSize(DEFAULT_SIZE);
 		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
@@ -100,8 +101,8 @@
 	}
 	
 	@Override
-	public void open(File file) {
-		
+	public List<Feature> open(File file) {
+		return null;
 	}
 	
 	@Override
@@ -430,29 +431,47 @@
 
 	@Override
 	public void startAnimation() {
-		// Build a frame, create a graph, and add the graph to the frame so you can actually see the graph.
-		if (objectCallGraph != null && aliasCollector != null) {
-			List<TracePoint> relatedPoints = objectCallGraph.getRelatedPoints();
-			TracePoint lastRP = relatedPoints.get(relatedPoints.size() - 1);
-			Map.Entry<Reference, String> rpInf = MagnetRONViewer.getRelatedInformation(lastRP);
-			WINDOW_TITLE = "extract delta of:" + rpInf.getKey().getSrcClassName() + "(" + rpInf.getKey().getSrcObjectId() + ")" + " -> " + rpInf.getKey().getDstClassName()+ "(" + rpInf.getKey().getDstObjectId()+ ")";
-			setTitle(WINDOW_TITLE);			
-			
-			viewer.init(objectCallGraph, aliasCollector, new CollaborationLayout());
-			List<Alias> aliasList = new ArrayList<>(aliasCollector.getAliasList());
-
-//			dv.setCoordinatorPoint(1200, 100);
-			viewer.initAnimation();
-//			for(int i = 0; i < aliasList.size(); i++) {
-//				System.out.println(aliasList.get(i).getObjectId() + ", " + aliasList.get(i).getMethodSignature() + " l." + aliasList.get(i).getLineNo() + " : " + aliasList.get(i).getAliasType().toString());
-//			}
-			for (int i = 0; i <= aliasList.size(); i++) {
-				viewer.stepToAnimation(i);
+		animationThread = new Thread() {
+			public void run() {	
+				// Build a frame, create a graph, and add the graph to the frame so you can actually see the graph.
+				if (objectCallGraph != null && aliasCollector != null) {
+					List<TracePoint> relatedPoints = objectCallGraph.getRelatedPoints();
+					TracePoint lastRP = relatedPoints.get(relatedPoints.size() - 1);
+					Map.Entry<Reference, String> rpInf = MagnetRONViewer.getRelatedInformation(lastRP);
+					WINDOW_TITLE = "extract delta of:" + rpInf.getKey().getSrcClassName() + "(" + rpInf.getKey().getSrcObjectId() + ")" + " -> " + rpInf.getKey().getDstClassName()+ "(" + rpInf.getKey().getDstObjectId()+ ")";
+					setTitle(WINDOW_TITLE);			
+					
+					viewer.init(objectCallGraph, aliasCollector, new CollaborationLayout());
+					List<Alias> aliasList = new ArrayList<>(aliasCollector.getAliasList());
+		
+//					dv.setCoordinatorPoint(1200, 100);
+					viewer.initAnimation();
+//					for(int i = 0; i < aliasList.size(); i++) {
+//						System.out.println(aliasList.get(i).getObjectId() + ", " + aliasList.get(i).getMethodSignature() + " l." + aliasList.get(i).getLineNo() + " : " + aliasList.get(i).getAliasType().toString());
+//					}
+					for (int i = 0; i <= aliasList.size(); i++) {
+						viewer.stepToAnimation(i);
+					}
+		
+				}
 			}
+		};
+		animationThread.start();
+	}
 
-		}
+	@Override
+	public void pauseAnimation() {
 	}
 	
+	@Override
+	public void resumeAnimation() {
+	}
+
+	@Override
+	public void stopAnimation() {
+		animationThread.stop();
+	}
+
 	public void startDeltaViewer(IObjectCallGraph ocg, IAliasCollector ac) {
 		// Build a frame, create a graph, and add the graph to the frame so you can actually see the graph.
 		if (ocg != null) {
diff --git a/src/org/ntlab/deltaViewer/MagnetRONMenuBar.java b/src/org/ntlab/deltaViewer/MagnetRONMenuBar.java
index d3cd5c4..60d8845 100644
--- a/src/org/ntlab/deltaViewer/MagnetRONMenuBar.java
+++ b/src/org/ntlab/deltaViewer/MagnetRONMenuBar.java
@@ -5,6 +5,7 @@
 
 import org.ntlab.actions.OpenAction;
 import org.ntlab.actions.StartAnimationAction;
+import org.ntlab.actions.StopAnimationAction;
 
 public class MagnetRONMenuBar extends JMenuBar {
 
@@ -21,6 +22,7 @@
 	
 		JMenu animationMenu = add(new JMenu("�A�j���[�V����"));
 		animationMenu.add(new StartAnimationAction(magnetRON));
+		animationMenu.add(new StopAnimationAction(magnetRON));
 	}
 
 	
diff --git a/src/org/ntlab/deltaViewer/MagnetRONViewer.java b/src/org/ntlab/deltaViewer/MagnetRONViewer.java
index 6fba4dc..be95f46 100644
--- a/src/org/ntlab/deltaViewer/MagnetRONViewer.java
+++ b/src/org/ntlab/deltaViewer/MagnetRONViewer.java
@@ -74,6 +74,7 @@
 		};
 		deltaAnimation = new DeltaAnimation(mxgraph, mxgraphComponent);
 		mxgraphComponent.setPreferredSize(DEFAULT_SIZE);
+		setLayout(new BorderLayout());
 		add(mxgraphComponent, BorderLayout.CENTER);
 	}