diff --git a/src/com/annimon/graphics/Application.java b/src/com/annimon/graphics/Application.java
new file mode 100644
index 0000000..453f5d8
--- /dev/null
+++ b/src/com/annimon/graphics/Application.java
@@ -0,0 +1,41 @@
+package com.annimon.graphics;
+
+import java.awt.Dimension;
+import java.awt.Graphics;
+import java.awt.image.BufferedImage;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.WindowConstants;
+
+/**
+ * 
+ * @author aNNiMON
+ */
+public abstract class Application extends JFrame {
+    
+    private final GraphicsExt graphics;
+        
+    public Application(int width, int height) {
+	setLocationByPlatform(true);
+	setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+
+        final BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+        graphics = new GraphicsExt(image.getGraphics(), width, height);
+        
+        final JPanel panel = new JPanel() {
+            @Override
+            protected void paintComponent(Graphics g) {
+                super.paintComponent(g);
+                Application.this.paint(graphics);
+                g.drawImage(image, 0, 0, null);
+            }
+        };
+        panel.setPreferredSize(new Dimension(width, height));
+	add(panel);
+	pack();
+
+	setVisible(true);
+    }
+    
+    protected abstract void paint(GraphicsExt g);
+}
diff --git a/src/com/annimon/graphics/GraphicsExt.java b/src/com/annimon/graphics/GraphicsExt.java
new file mode 100644
index 0000000..5b68b81
--- /dev/null
+++ b/src/com/annimon/graphics/GraphicsExt.java
@@ -0,0 +1,52 @@
+package com.annimon.graphics;
+
+import java.awt.Color;
+import java.awt.Graphics;
+
+/**
+ * 
+ * @author aNNiMON
+ */
+public class GraphicsExt {
+
+    public static final double X_MAX = 10d;
+    public static final double Y_MAX = 7d;
+    
+    private final Graphics g;
+    private final int width, height;
+    
+    private double oldX, oldY;
+
+    public GraphicsExt(Graphics g, int width, int height) {
+        this.g = g;
+        g.setColor(Color.WHITE);
+        g.fillRect(0, 0, width, height);
+        g.setColor(Color.BLACK);
+        this.width = width;
+        this.height = height;
+        oldX = oldY = 0;
+    }
+    
+    public void move(double x, double y) {
+        oldX = x;
+        oldY = y;
+    }
+    
+    public void draw(double x, double y) {
+        line(oldX, oldY, x, y);
+        oldX = x;
+        oldY = y;
+    }
+    
+    public void line(double x1, double y1, double x2, double y2) {
+        g.drawLine(convertX(x1), convertY(y1), convertX(x2), convertY(y2));
+    }
+    
+    private int convertX(double x) {
+        return (int) (x * (width / X_MAX) + 0.5d);
+    }
+    
+    private int convertY(double y) {
+        return (int) (height - (y * (height / Y_MAX) + 0.5d));
+    }
+}