diff --git a/main.py b/main.py
index 05fb252..bf23e22 100755
--- a/main.py
+++ b/main.py
@@ -16,6 +16,7 @@ def toggle_fullscreen(is_fullscreen):
 is_fullscreen = False
 fill_screen = True
 show_debug = False
+inverse = False
 screen = pygame.display.set_mode((600,500))#(0,0),pygame.FULLSCREEN)
 is_fullscreen,screensize = toggle_fullscreen(is_fullscreen)
 pygame.display.set_caption("Screensaver")
@@ -34,25 +35,24 @@ class DVD():
         self.scale = scale
         self.speed = speed
         self.pos = ri(0,screensize[0]-self.size[0]),ri(0,screensize[1]-self.size[1])
-        self.get_dvd()
+        self.get_dvd(False)
         self.richtung = ["r","u"]
-        self.render()
         
 
     def moving(self):
-        if self.pos[0]+self.scalesize[0] >= screensize[0]:
+        dvdx,dvdy = self.pos
+        if dvdx+self.scalesize[0] >= screensize[0]:
             self.richtung[0] = "l"
             self.newcolor()
-        if self.pos[0] <= 0:
+        if dvdx <= 0:
             self.richtung[0] = "r"
             self.newcolor()
-        if self.pos[1]+self.scalesize[1] >= screensize[1]:
+        if dvdy+self.scalesize[1] >= screensize[1]:
             self.richtung[1] = "o"
             self.newcolor()
-        if self.pos[1] <= 0:
+        if dvdy <= 0:
             self.richtung[1] = "u"
             self.newcolor()
-        dvdx,dvdy = self.pos
 
         if self.richtung[0] == "r":
             dvdx += self.speed
@@ -63,30 +63,30 @@ class DVD():
         else:
             dvdy -= self.speed
         self.pos = dvdx,dvdy
-        return dvdx,dvdy
+
         
     def newcolor(self):
         self.color = (ri(0,255),ri(0,255),ri(0,255))
 
-    def get_dvd(self):
-        scaledx = self.size[0]*self.scale
-        scaledy = self.size[1]*self.scale
-        self.scalesize = (scaledx,scaledy)
-        self.rendered_dvd = pygame.surface.Surface(self.scalesize, flags=pygame.SRCALPHA)
-        self.rendered_dvd = pygame.transform.scale(self.dvd,self.scalesize)#(self.scalesize[0],self.scalesize[1]+10))
-        
-        #self.rendered_dvd.fill(self.color)
-        #self.rendered_dvd2 = pygame.surface.Surface(self.scalesize, flags=pygame.SRCALPHA)
-        #_test_ = pygame.transform.threshold(self.rendered_dvd, self.rendered_dvd, (0, 0, 0), (0, 0, 0, 0), self.color, inverse_set=False)
-        #print(_test_)
-        #screen.blit(self.rendered_dvd2,self.pos)
-        screen.blit(self.rendered_dvd,self.pos)
+    def get_dvd(self,inverse):
+        scaledx = self.size[0] * self.scale
+        scaledy = self.size[1] * self.scale
+        self.scalesize = (scaledx, scaledy)
 
-    def render(self):
-        self.get_dvd()
+        self.sdvd = pygame.Surface(self.scalesize, flags=pygame.SRCALPHA)
         
-        pygame.draw.rect(screen,self.color,(self.pos[0],self.pos[1],self.scalesize[0],self.scalesize[1]))
-        screen.blit(self.rendered_dvd,self.pos)
+        pygame.draw.rect(self.sdvd, self.color, (0, 0, self.scalesize[0], self.scalesize[1]))
+        self.sdvd.blit(pygame.transform.scale(self.dvd, self.scalesize), (0, 0))
+        tempdvd = pygame.PixelArray(self.sdvd)
+        if inverse :
+            tempdvd.replace(self.color, (0,0,0,0))
+            tempdvd.replace((0,0,0), self.color)
+        else:
+            tempdvd.replace((0,0,0), (0,0,0,0))
+        del tempdvd
+
+        screen.blit(self.sdvd, self.pos)
+
 
 dvds = []
 dvds.append(DVD(1,1))#ri(1,10)))
@@ -119,6 +119,8 @@ if __name__ == "__main__":
            fill_screen = not fill_screen
         if pressed_keys[pygame.K_d] and not preview_pressed_keys[pygame.K_d]:
            show_debug = not show_debug
+        if pressed_keys[pygame.K_i] and not preview_pressed_keys[pygame.K_i]:
+           inverse = not inverse
         if pressed_keys[pygame.K_f] and screen.get_size():
             is_fullscreen,screensize = toggle_fullscreen(is_fullscreen)
         if pressed_keys[pygame.K_UP] and speeds>=0:
@@ -146,7 +148,7 @@ if __name__ == "__main__":
             a.speed = speeds
             a.scale = scales
             a.moving()
-            a.render()
+            a.get_dvd(inverse)
 
         if show_debug:
             get_debug_text()