diamond.py

while True:
    num = int(input())
    if (num < 3) or (num % 2 == 0): continue
    
    space = int(num / 2)
    
    for i in range(1, num, 2):
        print(' ' * space + '*' * i)
        space -= 1
        
    print('*' * num)
    
    for i in range(num-2, 0, -2):
        space += 1
        print(' ' * space + '*' * i)
        
    select = int(input())
    if select == 0: break