Constructor is created

Block.py

+# Block object which will be used in a corsi-blocks test
+
+class Block:
+
+    #Constructor to initiate a block (square)
+    #x and y -- coordinates of the top left corner
+    #length -- the length of one side of the square
+    def __init__(self, x, y, length):
+        self.x = x
+        self.y = y
+        self.length = length
+    
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