import time
import sys

def animate_string(input_string, delay_second=0.01):
    current_string = ""
    for target_char in input_string:
        if target_char == 'n':
            # Print a newline and reset current_string
            print()
            current_string = ""
            continue

        current_char = 'a'
        while current_char != target_char:
            a_code = ord(current_char)
            # previous string + current letter
            sys.stdout.write('r' + current_string + current_char)
            sys.stdout.flush()
            time.sleep(delay_second)
            # Move to the next char (used ASCII)
            current_char = chr(ord(current_char) + 1)
            # Handle bound issue
            if current_char == '{':  # After 'z'
                current_char = 'A'
            elif current_char == '[':  # After 'Z'
                current_char = target_char
        # Add the target character to the current string
        current_string += target_char
        # Print the updated current string
        sys.stdout.write('r' + current_string)
        sys.stdout.flush()
    # Print a newline at the end to finish the output cleanly
    print()

animate_string("fjweiofjewoifjweofjewofjewffewjfiowjfwaifjewipfajeehgpwth235r2fjweiofjewoifjweofjewofjewffewjfiowjfwaifjewipfajeehgpwth235r2fjweiofjewoifjweofjewofjewffewjfiowjfwaifjewipfajeehgpwth235r2fjweiofjewoifjweofjewofjewffewjfiowjfwaifjewipfajeehgpwth235r2", 0.0002)

This is my code. I am working on printing string in a cool way. It works fine with small number of characters, but when the string becomes long enough to reach the end of terminal, it starts printing the same line over and over. why does this happen and how can I solve the issue?