layers are cleanly extracted

Layer.py

@@ -1,17 +1,18 @@
 class Layer:
     #data = [(contour, (x,y,w,h)),]
-    data = []
+
     startFrame = None
     lastFrame = None
-    backgroundImage = []
 
     def __init__(self, startFrame, data):
         self.startFrame = startFrame
         self.lastFrame = startFrame
+        self.data = []
         self.data.append(data)
 
         print("Layer constructed")
 
     def add(self, frameNumber, data):
-        self.lastFrame = frameNumber
+        if not (self.startFrame + len(self.data) - frameNumber < 0):
-        self.data.append(data)
+            self.lastFrame = frameNumber
+            self.data.append(data)

LayerFactory.py

@@ -40,7 +40,7 @@ class LayerFactory:
                         print("LayerFactory: Layer knew no bounds")
                         continue
 
-                    if frameNumber - layer.lastFrame <= 5:
+                    if frameNumber - layer.lastFrame <= 1:
                         (x2,y2,w2,h2) = layer.data[-1][1]
                         if self.contoursOverlay((x-tol,y+h+tol), (x+w+tol,y-tol), (x2,y2+h2), (x2+w2,y2)):
                             foundLayer = True