A birthday message

birthday.py

import random
import time
import sys

COLORS = {
    'red': '\033[0;31m',
    'yellow': '\033[0;33m',
    'green': '\033[0;32m',
    'blue': '\033[0;34m',
    'purple': '\033[0;35m',
    'white': '\033[0;37m',
}
RESET = '\033[0m'

random_colors = [COLORS['red'], COLORS['yellow'], COLORS['green'], COLORS['blue'], COLORS['purple']]

target = "Happy Birthday, Dad!"

# ASCII 32 to 126 are the printable characters
current_state = [chr(random.SystemRandom().randint(32, 126)) for _ in target]

rand = random.SystemRandom()

while ''.join(current_state) != target:
    # Update each character that doesn't match the target
    for i in range(len(target)):
        if current_state[i] != target[i]:
            current_state[i] = chr(rand.randint(32, 126))

    # Clear the terminal screen and move cursor to top-left
    print('\033[2J\033[H', end='')

    for char, target_char in zip(current_state, target):
        if char == target_char:
            # Matched characters are white
            color = COLORS['white']
        else:
            # Unmatched characters get a random color
            color = rand.choice(random_colors)
        print(color + char, end='')

    print(RESET, end='')
    sys.stdout.flush()
    time.sleep(0.02)