itteration

number1 = int(input('Enter an integer:'))
number2 = number1


for i in range(number1,0,-1):
    print(" "*i*2,i)

print("-"*20)

while  number1 >= 0:
    print (" " *number1*2,number1)
    number1 -= 1

print("-"*20)

diagonal = 0
for i in range(number2,0,-1):
    print(" "*diagonal*2,i)
    diagonal += 1

print("-"*20)

diagonal = 0
while  number2 >= 0:
    print (" " *diagonal*2,number2)
    number2 -= 1
    diagonal += 1