Use Python to find the target SHA$-256$ hash that starts with one zero by appending a value x to $$hashBlock$1$ i$.$e$.$ find x so that SHA$-256($hashBlock$1,$ x$)$ starts with a zero

Can somebody help me extend the code I have to add more leading zeros $(2,3,4,5).$ Then tell me what do you notice?

import hashlib

BUF$\_$SIZE $=32768$

# Step $1$

hash$\_$object $=$ hashlib.sha$256()$

# Replace 'your$\_$file$\_$path.txt$\text{'}$ with the actual path to your file

file$\_$path $=$ 'your$\_$file$\_$path.txt$\text{'}$

# Step $2$

with open$($file$\_$path, $\text{'}$rb$\text{'})$ as f:

while True:

data $=$ f$.$read$($BUF$\_$SIZE$)$

hash$\_$object.update$($data$)$

if not data:

break

# Step $3$

hex$\_$digest $=$ hash$\_$object.hexdigest$()$

# Step $4$

with open$(\text{'}$hash$.$txt$\text{'},\text{'}$w$\text{'})$ as hash$\_$file:

hash$\_$file.write$($hex$\_$digest$)$

# Step $5$

with open$($file$\_$path, $\text{'}$a$\text{'})$ as modified$\_$file:

modified$\_$file.write$("$Additional content."$)$

# Step $6$

hash$\_$object $=$ hashlib.sha$256()$

with open$($file$\_$path, $\text{'}$rb$\text{'})$ as f:

while True:

data $=$ f$.$read$($BUF$\_$SIZE$)$

hash$\_$object.update$($data$)$

if not data:

break

# Step $7$

modified$\_$hex$\_$digest $=$ hash$\_$object.hexdigest$()$

# Step $8$

with open$(\text{'}$hash$.$txt$\text{'},\text{'}$a$\text{'})$ as hash$\_$file:

hash$\_$file.write$(\text{'}$

$\text{'}+$ modified$\_$hex$\_$digest$)$

# Step $9$

if hex$\_$digest $==$ modified$\_$hex$\_$digest:

print$("$The hashes are the same."$)$

else:

print$("$The hashes are different."$)$do you notice?