diff --git a/achterbahn.ino b/achterbahn.ino
index fd795e7..78a8bb2 100644
--- a/achterbahn.ino
+++ b/achterbahn.ino
@@ -215,7 +215,7 @@ void spawnWagon(){
   //Wagon tmpr = Wagon(maxid++,NUMPIXELS,&strip, height, random(0, 20), random(3,20), random(0.2, 50)/10.0, 0           , random(5,100) , Wheel(random(0,256))); //spawn new wagon
   int _randomlength=random(3,40); //3-> minimum vel 10,      40 -> minium vel 30
   //                                                      pos,      wagonlength,       startvel                                                                  ,  startacc,      trainmass,      wagoncolor
-  Wagon tmpr = Wagon(maxid++,NUMPIXELS,&strip, height, random(0, 20), _randomlength, random(map(_randomlength,3,40,10,30), map(_randomlength,3,40, 20,60))/10.0  , 0           , 20 , Wheel(random(0,256))); //spawn new wagon
+  Wagon tmpr = Wagon(maxid++,NUMPIXELS,&strip, height, random(0, 20), _randomlength, random(map(_randomlength,3,40,10,30), map(_randomlength,3,40, 20,60))/10.0  , 0           , 20 , Wheel((uint8_t)random(0,255))); //spawn new wagon
   
   wagon_arr.push_back(tmpr);
   Serial.println("Spawned Wagon");
@@ -442,9 +442,9 @@ void loop_achterbahn(){
       if (random(0,SPAWNCHANCEDOUBLE)==0){
         spawnWagon();
       }
-    }else{
-      Serial.println("no spawn");
-    }
+    }//else{
+      //Serial.println("no spawn");
+    //}
     
     
   }
diff --git a/wagon.cpp b/wagon.cpp
index 1974d7c..e05e48b 100644
--- a/wagon.cpp
+++ b/wagon.cpp
@@ -5,6 +5,7 @@
 #define WAGONLENGTH 5
 
 #define EDGE_WALL
+//#define EDGE_BOUNCE
 //#define EDGE_WRAP
 
 Wagon::Wagon(int id,int numpixels, Adafruit_NeoPixel *strip,uint8_t *height,float pos, float trainlength,float startvel,float startacc, float wagonmass, uint32_t wagoncolor)
@@ -19,9 +20,11 @@ Wagon::Wagon(int id,int numpixels, Adafruit_NeoPixel *strip,uint8_t *height,floa
   _acc=startacc;
   _wagonmass=wagonmass; //mass of whole train
   _spawntime=millis();
-  _lasttimefast=millis();
+  _lastvel=startvel;
+  _lastpositivedirchangepos=_numpixels+1000;
+  _lastpositivedirchangePosDifference=1000;
   _wagoncolor=wagoncolor;
-
+  _health=1.0;
 }
 
 bool Wagon::operator==(const Wagon &r) const {
@@ -118,30 +121,47 @@ void Wagon::updatePhysics(float updatedelayms)
   Serial.print(" Acc=");
   Serial.println(_acc);*/
 
-  float _testvel=_vel;
-  if (_testvel<0){
-    _testvel*=-1;
-  }
-  if (_testvel>SLOWVELOCITY){ //for despawn if slow
-    _lasttimefast=millis();
+    
+  if (_lastvel*_vel<0 && _lastvel>=0){ //direction changed, positive
+    _lastpositivedirchangePosDifference=_lastpositivedirchangepos-_pos;
+    Serial.print("DC pos=");
+    Serial.print(_pos);
+    Serial.print(" last=");
+    Serial.print(_lastpositivedirchangepos);
+    
+    Serial.print(" diff=");
+    Serial.println(_lastpositivedirchangePosDifference);
+    _lastpositivedirchangepos=_pos;
   }
+  _lastvel=_vel;
 
 
   if (_pos>=_numpixels){ 
     #ifdef EDGE_WRAP
       _pos-=_numpixels; //Wrap around edges
     #endif
+    #ifdef EDGE_BOUNCE
+      _vel*=-1; //bounce at edges
+    #endif
     #ifdef EDGE_WALL
-      _vel*=-1; //wall at edges
+      //nothing
     #endif
   }
   if (_pos<0){ 
     #ifdef EDGE_WRAP
       _pos=_numpixels+_pos; //warp around edges
     #endif
-    #ifdef EDGE_WALL
-      _vel*=-1;; //wall at edges
+    #ifdef EDGE_BOUNCE
+      _vel*=-1;; //bounce at edges
     #endif
+    #ifdef EDGE_WALL
+      //nothing
+    #endif
+  }
+
+  //fade out if health got low
+  if (_health<1.0 && _health>0.0){
+    _health-=0.0001; //reduce until 0
   }
   
 }
@@ -154,14 +174,14 @@ float Wagon::getHeight(int p){
       p=numpixels+p; //wrap edge
     #endif
     #ifdef EDGE_WALL
-      return _height[0]+p*-10; //edges as wall
+      return _height[0]+p*-100.0; //edges as wall
     #endif
   }else if(p>=_numpixels){
     #ifdef EDGE_WRAP
       p=p-numpixels; //wrap edge
     #endif
     #ifdef EDGE_WALL
-      return _height[_numpixels-1]+(p-_numpixels)*10; //edges as wall
+      return _height[_numpixels-1]+(p-_numpixels)*100.0; //edges as wall
     #endif
   }
   return _height[p];
@@ -191,10 +211,15 @@ void Wagon::updateGraphics()
     //uint8_t b=abs(_vel)*255.0;
     //uint32_t c=_strip->Color(b*featherbrightness,(255-b)*featherbrightness,0);
 
+    float healtpositive=_health;
+    if(healtpositive<0){ //only positive values for color
+      healtpositive=0;
+    }
+    
     uint32_t c=_wagoncolor;
-    uint8_t _r = (uint8_t)(c >> 16);
-    uint8_t _g = (uint8_t)(c >>  8);
-    uint8_t _b = (uint8_t)c;
+    uint8_t _r = (uint8_t)(c >> 16)*healtpositive;
+    uint8_t _g = (uint8_t)(c >>  8)*healtpositive;
+    uint8_t _b = (uint8_t)c*healtpositive;
 
     _r*=featherbrightness;
     _g*=featherbrightness;
@@ -245,7 +270,12 @@ bool Wagon::alive()
     return false;
   }*/
 
-  if (millis()>_lasttimefast+5000 ){ //too long too slow
+
+  if (_lastpositivedirchangePosDifference<=5){ //reduce health
+    //return false;
+    _health-=0.1;
+  }
+  if (_health<=0) {
     return false;
   }
   
diff --git a/wagon.h b/wagon.h
index 75de601..e3d5f50 100644
--- a/wagon.h
+++ b/wagon.h
@@ -28,8 +28,11 @@ class Wagon
     float _trainlength;
     uint8_t *_height;
     long _spawntime;
-    long _lasttimefast;
+    float _lastvel;
+    float _lastpositivedirchangepos;
+    float _lastpositivedirchangePosDifference;
     uint32_t _wagoncolor;
+    float _health;
 };
 
 #endif