diff --git a/src/GUI.java b/src/GUI.java
index fff87bc..17f3044 100644
--- a/src/GUI.java
+++ b/src/GUI.java
@@ -1,7 +1,10 @@
+import java.awt.BasicStroke;
+import java.awt.Color;
 import java.awt.Font;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.RenderingHints;
+import java.util.Iterator;
 
 import javax.swing.JFrame;
 import javax.swing.JPanel;
@@ -13,6 +16,9 @@ public class GUI extends JPanel {
 	
 	private Letter[][] letters;
 	
+	private boolean running;
+	private float marginRatio = 0.2f;
+	
 	public GUI() {
 		frame = new JFrame();
 		frame.setSize(1000, 800);
@@ -28,13 +34,60 @@ public class GUI extends JPanel {
 				letters[x][y] = new Letter();
 			}
 		}
+		
+		new Thread(new Runnable() {			
+			@Override
+			public void run() {
+				running = true;
+				while (running) {
+					repaint();
+					try {
+						Thread.sleep(16);
+					} catch (InterruptedException e) {
+						e.printStackTrace();
+					}
+				}
+			}
+		}).start();
 	}
 	
 	@Override
 	protected void paintComponent(Graphics g) {
 		Graphics2D g2d = (Graphics2D) g;
+		
+		if (letters == null) {
+			return;
+		}
+		
 		g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
-		g2d.setFont(new Font(null, Font.PLAIN, 80));
-		g2d.drawString("test", 100, 100);
+		g2d.setFont(new Font(null, Font.BOLD, 48));
+		g2d.setStroke(new BasicStroke(4));
+		
+		int framew = getSize().width;
+		int frameh = getSize().height;
+		
+		g2d.setColor(Color.DARK_GRAY);
+		g2d.fillRect(0, 0, framew, frameh);
+		
+		int letterSize = frameh / 10;
+		int margin = (int) (letterSize * marginRatio);
+		int offsetX = framew / 2 - (5 * letterSize + 4 * margin) / 2;
+		int offsetY = frameh / 2 - (6 * letterSize + 5 * margin) / 2;
+		
+		for (int x = 0; x < letters.length; x++) {
+			for (int y = 0; y < letters[0].length; y++) {
+				int posX = offsetX + x * (letterSize + margin);
+				int posY = offsetY + y * (letterSize + margin);
+				g2d.setColor(letters[x][y].getColor());
+				g2d.fillRect(posX, posY, letterSize, letterSize);
+				g2d.setColor(Color.BLACK);
+				g2d.drawRect(posX, posY, letterSize, letterSize);
+				
+				String letter = "" + letters[x][y].getLetter();
+				int letterWidth = g2d.getFontMetrics().stringWidth(letter);
+				
+				g2d.drawString(letter, posX + letterSize / 2 - letterWidth / 2, posY + letterSize / 2 + 20);
+			}
+		}
 	}
 }
diff --git a/src/Letter.java b/src/Letter.java
index 3a71439..6f64d06 100644
--- a/src/Letter.java
+++ b/src/Letter.java
@@ -1,19 +1,36 @@
+import java.awt.Color;
+
 public class Letter {
 
-	public static byte WHITE = -1;
-	public static byte GRAY = 0;
-	public static byte YELLOW = 1;
-	public static byte GREEN = 2;
+	public static final byte WHITE = -1;
+	public static final byte GRAY = 0;
+	public static final byte YELLOW = 1;
+	public static final byte GREEN = 2;
 	
 	private char letter;
 	private byte color;
 	
+	public Letter() {
+		letter = 'A';
+		color = (byte) ((byte) (Math.random() * 4) - 1);
+	}
+	
 	public void setColor(byte color) {
 		this.color = color;
 	}
 	
-	public byte getColor() {
-		return color;
+	public Color getColor() {
+		switch (color) {
+		case WHITE:
+			return new Color(200, 200, 200);
+		case GRAY:
+			return new Color(100, 100, 100);
+		case YELLOW:
+			return new Color(220, 220, 0);
+		case GREEN:
+			return new Color(0, 220, 0);
+		}
+		return Color.BLACK;
 	}
 	
 	public void setLetter(char letter) {