Matrix Falling Japanese Blue Text

import random
import time
import os
import sys

def clear_screen():
    if os.name == 'posix':
        _ = os.system('clear')
    else:
        _ = os.system('cls')

def get_terminal_size():
    size = os.get_terminal_size()
    return size.columns, size.lines

# Automatically calculate terminal size
WINDOW_WIDTH, WINDOW_HEIGHT = get_terminal_size()
# Adjust as necessary to fit your terminal's character dimensions and desired appearance
WINDOW_HEIGHT -= 1  # Adjusting to leave space for prompt visibility

SPEED = 0.05  # Lower is faster

def generate_color():
    """Generates a random color in RGB format."""
    emphasize_color = random.choice(['R', 'G', 'B'])
    if emphasize_color == 'R':
        color_value = random.randint(95, 255)
        return f'\033[38;2;{color_value};0;0m'
    elif emphasize_color == 'G':
        color_value = random.randint(95, 255)
        return f'\033[38;2;0;{color_value};0m'
    elif emphasize_color == 'B':
        color_value = random.randint(95, 255)
        return f'\033[38;2;0;0;{color_value}m'

def generate_char():
    return chr(random.randint(0x30A0, 0x30FF))  # Japanese characters range

def print_at_pos(x, y, char, color):
    sys.stdout.write(f"\033[{y};{x}H{color}{char}\033[0m")

def init_matrix():
    return [[' ' for _ in range(WINDOW_WIDTH)] for _ in range(WINDOW_HEIGHT)]

def update_matrix(matrix):
    for x in range(WINDOW_WIDTH):
        if random.randint(0, 10) < 2:
            matrix[0][x] = generate_char()
        else:
            matrix[0][x] = ' '
    for y in range(WINDOW_HEIGHT - 1, 0, -1):
        for x in range(WINDOW_WIDTH):
            matrix[y][x] = matrix[y-1][x]

def print_matrix(matrix):
    for y in range(WINDOW_HEIGHT):
        for x in range(WINDOW_WIDTH):
            char = matrix[y][x]
            if char != ' ':
                print_at_pos(x+1, y+1, char, generate_color())

def main():
    clear_screen()
    matrix = init_matrix()

    try:
        while True:
            update_matrix(matrix)
            print_matrix(matrix)
            time.sleep(SPEED)
    except KeyboardInterrupt:
        clear_screen()
        sys.exit()

if __name__ == "__main__":
    main()