'''
Starting with the number 1 and moving to the right in a clockwise direction a 5 by 5 spiral is formed as follows:

21 22 23 24 25
20  7  8  9 10
19  6  1  2 11
18  5  4  3 12
17 16 15 14 13

It can be verified that the sum of the numbers on the diagonals is 101.

What is the sum of the numbers on the diagonals in a 1001 by 1001 spiral formed in the same way?
'''

gridSize = 1001
mySum = 0
myNum = 1
currentSpace = 2
loopSize = int((gridSize-1) / 2)
for i in range(loopSize):
    for j in range(4):
        
        mySum += myNum
        print("Number to add = " + str(myNum + currentSpace))
        myNum += currentSpace
        print("CurrentSum = " + str(mySum))
        
    currentSpace += 2
    
print("CurrentSum = " + str(mySum + myNum))
