Assistance with Fibonacci code

[Colombian1976]

hello There,

There is an "logic" error on my code, and I have not figured it out, what it is!!

Code:

#Fibonacci numbers

x = 1
y = 1
z = 0

while z < 1000:
x = y
y = z
z = x + y
print(z)

Why is it printing above 1000? What am I missing here? (Note, I am still very new to Python)

any help appreciated

Cheers
Colombian1976