diff --git a/bin/sig/Color.class b/bin/sig/Color.class
new file mode 100644
index 0000000..f642ad4
Binary files /dev/null and b/bin/sig/Color.class differ
diff --git a/bin/sig/Panel.class b/bin/sig/Panel.class
index f510fa9..b5a3a60 100644
Binary files a/bin/sig/Panel.class and b/bin/sig/Panel.class differ
diff --git a/bin/sig/PolygonFill.class b/bin/sig/PolygonFill.class
index de7fb2f..8d5c046 100644
Binary files a/bin/sig/PolygonFill.class and b/bin/sig/PolygonFill.class differ
diff --git a/src/sig/Color.java b/src/sig/Color.java
new file mode 100644
index 0000000..48573c3
--- /dev/null
+++ b/src/sig/Color.java
@@ -0,0 +1,33 @@
+package sig;
+
+public class Color {
+	int r,g,b;
+	
+	final static public Color BLACK = new Color(0,0,0);
+	final static public Color RED = new Color(204,0,0);
+	final static public Color GREEN = new Color(78,154,6);
+	final static public Color YELLOW = new Color(196,160,0);
+	final static public Color BLUE = new Color(114,159,207);
+	final static public Color MAGENTA = new Color(117,80,123);
+	final static public Color CYAN = new Color(6,152,154);
+	final static public Color WHITE = new Color(211,215,207);
+	final static public Color BRIGHT_BLACK = new Color(85,87,83);
+	final static public Color BRIGHT_RED = new Color(239,41,41);
+	final static public Color BRIGHT_GREEN = new Color(138,226,52);
+	final static public Color BRIGHT_YELLOW = new Color(252,233,79);
+	final static public Color BRIGHT_BLUE = new Color(50,175,255);
+	final static public Color BRIGHT_MAGENTA = new Color(173,127,168);
+	final static public Color BRIGHT_CYAN = new Color(52,226,226);
+	final static public Color BRIGHT_WHITE = new Color(255,255,255);
+
+	public Color(int r, int g, int b) {
+		super();
+		this.r = r;
+		this.g = g;
+		this.b = b;
+	}
+	
+	public int getColor() {
+		return (r<<16)+(g<<16)+b;
+	}
+}
diff --git a/src/sig/Panel.java b/src/sig/Panel.java
index 521244b..2eb64f2 100644
--- a/src/sig/Panel.java
+++ b/src/sig/Panel.java
@@ -21,6 +21,8 @@ public class Panel extends JPanel implements Runnable {
     private ColorModel cm;   
     int scanLine=0;
     int nextScanLine=0;
+    double x_offset=0;
+    double y_offset=0;
 
     public Panel() {
         super(true);
@@ -83,13 +85,16 @@ public class Panel extends JPanel implements Runnable {
         int[] p = pixel; // this avoid crash when resizing
         //a=h/w
         
-        for (int x=0;x<1280;x++) {
-        	for (int y=0;y<720;y++) {
-        		p[y*1280+x]=(0<<16)+(0<<8)+0;
+        for (int x=0;x<width;x++) {
+        	for (int y=0;y<height;y++) {
+        		p[y*width+x]=(0<<16)+(0<<8)+0;
         	}
         }
         
-        FillPolygon(new Point[] {
+        x_offset=50;
+        y_offset=50;
+        
+        FillPolygon(p,Color.BLUE,new Point[] {
         		new Point(135,2),
         		new Point(166,96),
         		new Point(265,97),
@@ -103,7 +108,7 @@ public class Panel extends JPanel implements Runnable {
         });
     }
     
-    public void FillPolygon(Point...points) {
+    public void FillPolygon(int[] p,Color col,Point...points) {
     	Edge[] edges = new Edge[points.length];
     	List<Edge> edges_sorted = new ArrayList<Edge>();
     	for (int i=0;i<points.length;i++) {
@@ -141,7 +146,10 @@ public class Panel extends JPanel implements Runnable {
 	    			Edge e1 = active_edges.get(i);
 	    			Edge e2 = active_edges.get(i+1);
 	    			for (int x=(int)Math.round(e1.x_of_min_y);x<=e2.x_of_min_y;x++) {
-	    				pixel[scanLine*width+x]=(255<<16)+(0<<8)+0;
+	    				int index = (scanLine+(int)y_offset)*width+x+(int)x_offset;
+	    				if (index<p.length&&index>=0) {
+	    					p[index]=col.getColor();
+	    				}
 	    			}
 	    		}
 	    		for (int i=0;i<active_edges.size();i++) {
diff --git a/src/sig/PolygonFill.java b/src/sig/PolygonFill.java
index 0326df5..ccfc6cc 100644
--- a/src/sig/PolygonFill.java
+++ b/src/sig/PolygonFill.java
@@ -16,6 +16,7 @@ public class PolygonFill {
 		
 		while (true) {
 			p.render();
+            try {Thread.sleep(20);} catch (InterruptedException e) {}
 		}
 	}
 }