diff --git a/src/diveengine2d/Engine.java b/src/diveengine2d/Engine.java
index 6953223..6ba6f96 100644
--- a/src/diveengine2d/Engine.java
+++ b/src/diveengine2d/Engine.java
@@ -65,10 +65,12 @@ public class Engine extends Canvas {
 		bs = getBufferStrategy();
 		
 		while(true) {
+			long startTime = System.currentTimeMillis();
 			updateScene();
 			repaint();
+			int elapsed = (int)(System.currentTimeMillis() - startTime);
 			try{
-				Thread.sleep(17);
+				Thread.sleep(16 - elapsed);
 			}catch(Exception e) {
 				
 			}
diff --git a/src/diveengine2d/RigidBody.java b/src/diveengine2d/RigidBody.java
index 7044f97..0194a4d 100644
--- a/src/diveengine2d/RigidBody.java
+++ b/src/diveengine2d/RigidBody.java
@@ -2,7 +2,15 @@ package diveengine2d;
 
 public class RigidBody extends DiveScript{
 	
+	public float dx, dy, drot;
+	public float friction = 0.99f;
+	
 	public void update() {
-		
+		entity.x += dx;
+		entity.y += dy;
+		entity.rotation += drot;
+		dx *= .3;
+		dy *= .3;
+		drot *= .3;
 	}
 }