diff --git a/achterbahn.ino b/achterbahn.ino
index 9d3a63a..50c1eeb 100644
--- a/achterbahn.ino
+++ b/achterbahn.ino
@@ -24,6 +24,10 @@ long lastCheckspawn=0;
 #define CHECKSPAWNDELAY 4000 //delay in ms to check random spawn
 #define SPAWNCHANCE 20 //1 out of x times wagon will spawn
 #define SPAWNCHANCEDOUBLE 5 //change of spawning a two trains simultaneously
+long lastCheckspawnEffect=0;
+#define CHECKSPAWNDELAY_EFFECT 2000 //delay in ms to check random effect
+#define SPAWNCHANCE_EFFECT_SCANNER 100 //1 out of x times spawn effect
+#define SPAWNCHANCE_EFFECT_FLASH 80 //1 out of x times spawn effect
 
 #define BRIGHTNESS_RUN 200
 #define BRIGHTNESS_DEBUG 150
@@ -389,7 +393,7 @@ void checkSerial(){
         effect=new FX_Scanner(NUMPIXELS,&strip,height,255,-200,strip.Color(100,0,0));
       }else if (serialstring.equals("fx_flash")){
         Serial.println("Effect Flash");
-        effect=new FX_Flash(NUMPIXELS,&strip,strip.Color(200,200,200));
+        effect=new FX_Flash(NUMPIXELS,&strip,height,strip.Color(200,200,200));
       }
     }
     
@@ -494,11 +498,18 @@ void loop_achterbahn(){
       if (random(0,SPAWNCHANCEDOUBLE)==0){
         spawnWagon();
       }
-    }//else{
-      //Serial.println("no spawn");
-    //}
-    
-    
+    }
+  }
+
+
+  //Check Effect Spawning
+  if (effect==NULL && lastCheckspawnEffect+CHECKSPAWNDELAY_EFFECT<loopmillis) {
+    lastCheckspawnEffect=loopmillis;
+    if (random(0,SPAWNCHANCE_EFFECT_SCANNER)==0){
+      effect=new FX_Scanner(NUMPIXELS,&strip,height,255,-200,strip.Color(100,0,0));
+    }else if (random(0,SPAWNCHANCE_EFFECT_FLASH)==0){
+      effect=new FX_Flash(NUMPIXELS,&strip,height,strip.Color(200,200,200));
+    }
   }
 
   
diff --git a/fx_flash.cpp b/fx_flash.cpp
index 74ef012..cfb26f2 100644
--- a/fx_flash.cpp
+++ b/fx_flash.cpp
@@ -1,14 +1,15 @@
 #include "fx_flash.h"
 #include "effect.h"
 
-#define FLASHTIME 10 //in ms
-
-FX_Flash::FX_Flash(int numpixels,Adafruit_NeoPixel *strip,uint32_t flashcolor)
+FX_Flash::FX_Flash(int numpixels,Adafruit_NeoPixel *strip,uint8_t *height,uint32_t flashcolor)
 {
   _numpixels=numpixels;
   _strip=strip;
   _flashcolor=flashcolor;
   _starttime=millis();
+  _brightness=0;
+  _flashtime=random(200,3000);
+  _height=height;
 }
 
 FX_Flash::FX_Flash()
@@ -17,41 +18,61 @@ FX_Flash::FX_Flash()
 
 void FX_Flash::updateRoutine(float updatedelayms)
 {
+  
+  float negativelikelihood=pow(( (millis()-_starttime)*1.0/_flashtime ),2); // 0=most likely, 1=unlikely
+  _brightness*=0.2;
+  if (random(0,negativelikelihood*20)==0){
+    _brightness=random(100,255);
+  }
+  //_brightness=(1.0-pow((255-_brightness)/255.0,4))*255.0;
 }
 
 void FX_Flash::updateGraphics()
 {
+  #define STARTFLASHHEIGHT 100
+  #define BRIGHTFLASHHEIGHT 150
   for(int i=0;i<_numpixels;i++){
-      
-    uint8_t _r = _flashcolor >> 16;
-    uint8_t _g = _flashcolor >> 8;
-    uint8_t _b = _flashcolor;
+    if (_height[i]>=STARTFLASHHEIGHT){
+      uint8_t heightbrightness=map(_height[i],STARTFLASHHEIGHT,BRIGHTFLASHHEIGHT,0,255);
+        
+      uint8_t _r = _flashcolor >> 16;
+      uint8_t _g = _flashcolor >> 8;
+      uint8_t _b = _flashcolor;
+  
+      _r*=_brightness/255.0;
+      _g*=_brightness/255.0;
+      _b*=_brightness/255.0;
 
-
-    uint32_t _pxcolor=_strip->getPixelColor(i); //get current color of that pixel
-    uint8_t _pxr = _pxcolor >> 16;
-    uint8_t _pxg = _pxcolor >> 8;
-    uint8_t _pxb = _pxcolor;
-    uint16_t _tmpr=_pxr+_r; //add colors
-    uint16_t _tmpg=_pxg+_g;
-    uint16_t _tmpb=_pxb+_b;
-    if (_tmpr>255){ //clamp
-      _tmpr=255;
+      _r*=heightbrightness/255.0;
+      _g*=heightbrightness/255.0;
+      _b*=heightbrightness/255.0;
+  
+  
+      uint32_t _pxcolor=_strip->getPixelColor(i); //get current color of that pixel
+      uint8_t _pxr = _pxcolor >> 16;
+      uint8_t _pxg = _pxcolor >> 8;
+      uint8_t _pxb = _pxcolor;
+      uint16_t _tmpr=_pxr+_r; //add colors
+      uint16_t _tmpg=_pxg+_g;
+      uint16_t _tmpb=_pxb+_b;
+      if (_tmpr>255){ //clamp
+        _tmpr=255;
+      }
+      if (_tmpg>255){
+        _tmpg=255;
+      }
+      if (_tmpb>255){
+        _tmpb=255;
+      }
+      _strip->setPixelColor(i,_tmpr,_tmpg,_tmpb); //draw pixel
     }
-    if (_tmpg>255){
-      _tmpg=255;
-    }
-    if (_tmpb>255){
-      _tmpb=255;
-    }
-    _strip->setPixelColor(i,_tmpr,_tmpg,_tmpb); //draw pixel
     
   }
 }
 
 bool FX_Flash::active()
 {
-  if (millis()-_starttime>FLASHTIME){
+  if (millis()-_starttime>_flashtime){
     return false;
   }
   return true;
diff --git a/fx_flash.h b/fx_flash.h
index 95162ee..1b209c0 100644
--- a/fx_flash.h
+++ b/fx_flash.h
@@ -7,7 +7,7 @@
 class FX_Flash : public Effect
 {
   public:
-    FX_Flash(int numpixels,Adafruit_NeoPixel *strip,uint32_t flashcolor);
+    FX_Flash(int numpixels,Adafruit_NeoPixel *strip,uint8_t *height,uint32_t flashcolor);
     FX_Flash();
     void updateRoutine(float updatedelayms);
     void updateGraphics();
@@ -18,6 +18,9 @@ class FX_Flash : public Effect
     Adafruit_NeoPixel *_strip;
     uint32_t _flashcolor;
     long _starttime;
+    uint8_t _brightness;
+    long _flashtime;
+    uint8_t *_height;
 };
 
 #endif