diff --git a/app/src/main/java/sma/rhythmtapper/framework/Graphics.java b/app/src/main/java/sma/rhythmtapper/framework/Graphics.java
index a39763a..10c8710 100644
--- a/app/src/main/java/sma/rhythmtapper/framework/Graphics.java
+++ b/app/src/main/java/sma/rhythmtapper/framework/Graphics.java
@@ -1,6 +1,7 @@
 package sma.rhythmtapper.framework;
 
 import android.graphics.Paint;
+import android.graphics.Path;
 
 /**
  * Created by Peter on 23.01.2017.
@@ -14,6 +15,8 @@ public static enum ImageFormat {
 
     public void clearScreen(int color);
 
+    public void DrawPath(Path path);
+
     public void drawLine(int x, int y, int x2, int y2, int color, int stroke);
 
     public void drawLine(int x, int y, int x2, int y2, int color);
diff --git a/app/src/main/java/sma/rhythmtapper/framework/Impl/RTGraphics.java b/app/src/main/java/sma/rhythmtapper/framework/Impl/RTGraphics.java
index b11d406..74e11da 100644
--- a/app/src/main/java/sma/rhythmtapper/framework/Impl/RTGraphics.java
+++ b/app/src/main/java/sma/rhythmtapper/framework/Impl/RTGraphics.java
@@ -88,6 +88,12 @@ public void clearScreen(int color) {
                 (color & 0xff));
     }
 
+    @Override
+    public void DrawPath(Path path)
+    {
+        canvas.drawPath(path,paint);
+    }
+
     @Override
     public void drawLine(int x, int y, int x2, int y2, int color, int stroke) {
         paint.setColor(color);
@@ -95,7 +101,6 @@ public void drawLine(int x, int y, int x2, int y2, int color, int stroke) {
         canvas.drawLine(x, y, x2, y2, paint);
     }
 
-
     @Override
     public void drawLine(int x, int y, int x2, int y2, int color) {
         drawLine(x, y, x2, y2, color, 10);
diff --git a/app/src/main/java/sma/rhythmtapper/game/NoteFile/TWxFile.java b/app/src/main/java/sma/rhythmtapper/game/NoteFile/TWxFile.java
index 6a23ec1..5878b98 100644
--- a/app/src/main/java/sma/rhythmtapper/game/NoteFile/TWxFile.java
+++ b/app/src/main/java/sma/rhythmtapper/game/NoteFile/TWxFile.java
@@ -65,7 +65,7 @@ public static List<Ball> Read(File file) throws FileNotFoundException, JSONExcep
 		    Log.v(TAG,"connect "+id+" with"+prevMap.get(id));
 			Ball ba = id2Ball.get(id);			//formar
 			ba.nextBall = id2Ball.get(prevMap.get(id));	//next
-			if(ba.isSlideNote()||ba.isLongNote())
+			if((ba.isSlideNote()||ba.isLongNote()) && (ba.nextBall.isSlideNote() || ba.nextBall.isLongNote()))
 			{
 				ba.connector= new Tail(ba, ba.nextBall);
 			} else{
diff --git a/app/src/main/java/sma/rhythmtapper/game/models/Connector.java b/app/src/main/java/sma/rhythmtapper/game/models/Connector.java
index 23feae3..f99aafb 100644
--- a/app/src/main/java/sma/rhythmtapper/game/models/Connector.java
+++ b/app/src/main/java/sma/rhythmtapper/game/models/Connector.java
@@ -1,5 +1,6 @@
 package sma.rhythmtapper.game.models;
 
+import android.graphics.Color;
 import android.util.Log;
 
 import sma.rhythmtapper.framework.Impl.*;
@@ -39,7 +40,7 @@ public void Paint(Graphics g) {
         UpdateGhosts();
         //	}
 
-        g.drawLine(ghost1x, ghost1y, ghost2x, ghost2y,ball1.color,40);
+        g.drawLine(ghost1x, ghost1y, ghost2x, ghost2y, Color.LTGRAY,40);
         /*if(ghost1y > EnvVar.HITBOX_CENTER && ghost2y <EnvVar.HITBOX_CENTER) {
             int helperx = (GameScreen.HITBOX_CENTER - ghost1y) * (ghost2x - ghost1x) / (ghost2y - ghost1y) + ghost1x;
             g.drawImage(Assets.ballHitpoint, (int) (helperx - SIZE_BALL), (int) (EnvVar.HITBOX_CENTER - SIZE_BALL)
diff --git a/app/src/main/java/sma/rhythmtapper/game/models/Deck.java b/app/src/main/java/sma/rhythmtapper/game/models/Deck.java
index 6b2b612..8467dc2 100644
--- a/app/src/main/java/sma/rhythmtapper/game/models/Deck.java
+++ b/app/src/main/java/sma/rhythmtapper/game/models/Deck.java
@@ -176,7 +176,7 @@ public void Apply(GameStatusBundle bundle)
         //how to apply combo bonus?
         //score bonus?
         int basicScore=totalAppeal/100;
-        //bundle.testResult = TestResult.PERFECT;
+        bundle.testResult = TestResult.PERFECT;
         if(bundle.testResult.compareTo(TestResult.NICE)<=0)
             bundle.continueCombo=false;
         else
diff --git a/app/src/main/java/sma/rhythmtapper/game/models/Tail.java b/app/src/main/java/sma/rhythmtapper/game/models/Tail.java
index 9699641..6210f3b 100644
--- a/app/src/main/java/sma/rhythmtapper/game/models/Tail.java
+++ b/app/src/main/java/sma/rhythmtapper/game/models/Tail.java
@@ -1,31 +1,107 @@
 package sma.rhythmtapper.game.models;
+import android.graphics.Path;
+
 import sma.rhythmtapper.framework.*;
 import sma.rhythmtapper.game.*;
 import static sma.rhythmtapper.game.EnvVar.SIZE_BALL;
 
 public class Tail extends Connector
 {
-	public Tail(Ball ball1,Ball ball2)
+	private final boolean optimized;
+	private boolean created = false;
+	public Tail(Ball ball1, Ball ball2)
 	{
 		super(ball1,ball2);
+		created = false;
+		if(ball1.startLine== ball2.startLine && ball1.endLine == ball2.endLine)
+		{
+			optimized = true;
+		} else {
+			optimized = false;
+		}
 	}
 	float[] tailxs;
+	transient Path path;// = new Path();
 	@Override
 	public void Paint(Graphics g) {	
        	UpdateGhosts();
-		MakeTails();
+       	if(path ==null)
+       		path = new Path();
+       	if(optimized)
+		{
+			if(!created)
+			{
+			//	MakeTails();
+			}
+			//Draw optimized tail
+			int prevx=0, prevy = 0;
+			prevx = ghost2x;
+			prevy =  ghost2y;
+			//path.moveTo(ghost2x, ghost2y);
+			int dy = ghost1y - ghost2y;
+			for(int y = ghost2y+EnvVar.speed; y < ghost1y; y += EnvVar.speed){
+				float tt = (ball1.t - ball2.t)/(ghost1y-ghost2y)*(y-ghost1y)+ball1.t;
+				int x = Ball.getXfromT(ball2.origx, ball1.endx, tt);
+				g.drawLine(prevx, prevy, x, y, ball1.color, 50);
+				if(y > EnvVar.HITBOX_CENTER && prevy <EnvVar.HITBOX_CENTER) {
+					int helperx = (GameScreen.HITBOX_CENTER - y) * (prevx - x) / (prevy - y) + x;
+					g.drawImage(Assets.ballHitpoint, (int) (helperx - SIZE_BALL), (int) (EnvVar.HITBOX_CENTER - SIZE_BALL), SIZE_BALL * 2, SIZE_BALL * 2);
+				}
+				prevx = x;
+				prevy = y;
+			}
+			g.drawLine(prevx, prevy, ghost1x, ghost1y, ball1.color, 50);
+			if(ghost1y > EnvVar.HITBOX_CENTER && prevy <EnvVar.HITBOX_CENTER) {
+				int helperx = (GameScreen.HITBOX_CENTER - ghost1y) * (prevx - ghost1x) / (prevy - ghost1y) + ghost1x;
+				g.drawImage(Assets.ballHitpoint, (int) (helperx - SIZE_BALL), (int) (EnvVar.HITBOX_CENTER - SIZE_BALL), SIZE_BALL * 2, SIZE_BALL * 2);
+			}
+
+			//int starti = ghost2y
+			//for(int i = starti; i < tailxs.length; i++) {
+			//	y += EnvVar.speed;
+			//	path.lineTo(tailxs[i], y);
+			//}
+			//path.close();
+			//g.DrawPath(path);
+		} else {
+       		//Create Dynamic tail
+			//
+			//path.reset();
+			int prevx=0, prevy = 0;
+			prevx = ghost2x;
+			prevy =  ghost2y;
+			int dy = ghost1y - ghost2y;
+			for(int y = ghost2y+EnvVar.speed; y < ghost1y; y += EnvVar.speed){
+				float tt = (float)(y-ghost2y) / (float)(dy);
+				int x = Ball.getXfromT(ghost2x, ghost1x, tt);
+				g.drawLine(prevx, prevy, x, y, ball1.color, 50);
+				if(y > EnvVar.HITBOX_CENTER && prevy <EnvVar.HITBOX_CENTER) {
+					int helperx = (GameScreen.HITBOX_CENTER - y) * (prevx - x) / (prevy - y) + x;
+					g.drawImage(Assets.ballHitpoint, (int) (helperx - SIZE_BALL), (int) (EnvVar.HITBOX_CENTER - SIZE_BALL), SIZE_BALL * 2, SIZE_BALL * 2);
+				}
+				prevx = x;
+				prevy = y;
+				//path.lineTo(x,y);
+			}
+			g.drawLine(prevx, prevy, ghost1x, ghost1y, ball1.color, 50);
+			if(ghost1y > EnvVar.HITBOX_CENTER && prevy <EnvVar.HITBOX_CENTER) {
+				int helperx = (GameScreen.HITBOX_CENTER - ghost1y) * (prevx - ghost1x) / (prevy - ghost1y) + ghost1x;
+				g.drawImage(Assets.ballHitpoint, (int) (helperx - SIZE_BALL), (int) (EnvVar.HITBOX_CENTER - SIZE_BALL), SIZE_BALL * 2, SIZE_BALL * 2);
+			}
+
+			//path.lineTo(ghost1x,ghost1y);
+			//path.close();
+			//g.DrawPath(path);
+		}
 		int x = ghost2x;
 		int y = ghost2y;
-		for(int i=0;i<tailxs.length;i++)
+		//for(int i=0;i<tailxs.length;i++)
 		{
 			//x = tailxs[i];
 			//y = 
 		}
-        g.drawLine(ghost1x, ghost1y, ghost2x, ghost2y,ball1.color,40);
-        if(ghost1y > EnvVar.HITBOX_CENTER && ghost2y <EnvVar.HITBOX_CENTER) {
-            int helperx = (GameScreen.HITBOX_CENTER - ghost1y) * (ghost2x - ghost1x) / (ghost2y - ghost1y) + ghost1x;
-            g.drawImage(Assets.ballHitpoint, (int) (helperx - SIZE_BALL), (int) (EnvVar.HITBOX_CENTER - SIZE_BALL), SIZE_BALL * 2, SIZE_BALL * 2);
-        }
+        //g.drawLine(ghost1x, ghost1y, ghost2x, ghost2y,ball1.color,40);
+
         return;
     }
 	public void MakeTails()
diff --git a/build.gradle b/build.gradle
index 2fc827a..35689fd 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.2'
+        classpath 'com.android.tools.build:gradle:3.4.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files