Update app.py

app.py

@@ -6,7 +6,7 @@ def build(size=5):
 
     box=[] 
     box_o=[x for x in range(size)]
-    box.append(box_o) for i in range(size)
+    for i in range(size):box.append(box_o) 
     print(box)
     box_cent=int(tot/2)
     num_h,num_v=0,0