help with assignment

[Mof44]

Little update:

def print_spruce(n):
       for i in range(1, n+1): 
              print (" " *(n-i) + "X"*(2*i-1))
              print (" " * (n-1) + "X")
n = int(input("Write the size of the spruce:"))
print_spruce(n)

terminal:

Write the size of the spruce:5
    X
    X
   XXX
    X
  XXXXX
    X
 XXXXXXX
    X
XXXXXXXXX
    X

So, what should I change?

---

I think this is the cloest to my goal:

def print_spruce(n):
       for i in range(1, n+1, 2): 
              print (" " *(n-i) + "X"*(2*i-1))
              print (" " * (n-1) + "X")
n = int(input("Write the size of the spruce:"))
print_spruce(n+1)

terminal:

Write the size of the spruce:5
     X
     X
   XXXXX
     X
 XXXXXXXXX
     X

So, where are the mistakes?