do some cleanup and add comments to factory methods

blink.py

 PINK = (255, 0, 255)
+LIGHTBLUE = (0, 255, 255)
+BLUE = (0, 0, 255)
 
 class Thing:
     def __init__(self, matrix):
@@ -16,8 +18,8 @@ class Thing:
         """Returns a tuple, where where the pixels in every 2nd line are in reverse order.
 
         """
-        tmp = self.snakify()
-        return self.tuplify(tmp)
+        
+        return self.tuplify(self.snakify())
 
 
     def snakify(self):
@@ -61,8 +63,17 @@ class Thing:
 
     
 def from_heart(color = PINK):
+    """
+    Creates an Thing object that contains a heart
+    """
     return Thing(heart_tuple(color))
 
+def from_eck(color = PINK):
+    """
+    Creates a Thing object that contains an eck
+    """
+    return Thing(eck_tuple(color))
+
 
 def heart_tuple(color):