You can activate your program via the command prompt and then write this block of code in python:
import random
import shutil
columns, rows = shutil.get_terminal_size(fallback=(80, 24))
size_of_console = columns * rows
for i in range (size_of_console):
print(chr(random.randint(33, 126)), end = '')
make sure you have the right libraries installed and you are good to go!
If you have further questions I would love to help!
solved How to make random characters and numbers appear all over the screen, from up to down like an animation? [closed]