Update app.py

app.py

@@ -8,7 +8,11 @@ def build(size=5):
     box_o=[x for x in range(size)]
     for i in range(size):box.append(box_o) 
     print(box)
-    box_cent=int(tot/2)
+    box_cent=int(len(box)/2)
+    print(box_cent)
+    cent=int(len(box_cent)/2)
+    print(cent)
+    print(box_cent[cent])
     num_h,num_v=0,0
     for i in range(1,tot):
         box[box_cent]=i