dc.py

#!/usr/bin/env python3

TEXT = """                                                      ./--::/`{a}                           
                                                    `.-.`:`/`                         
                                                   `-:` -`:.                          
                                                  .--``-`..                           
                                                `.-- `-:--                            
                                               .--- `.:-/                             
                                              .--.  .:--{a}                              
                                            `.--. `-:--`                              
                                           ..-...`--:-`                               
                                          `.--````.-:..                       `````{a} 
                               .......```.--``.`.-+.-                      `..`-.-    
                              `:.-/:////--.``` ..:./                      `.` ..-`    
                              `:--:--://-``.  `.-:.:                    ```` `.`.     
                                ````....` `:..--.-`-                   ```  `.`-      
                                   ..-`` .  .`..-..`                 ````  `..-`      
        `````````````````````````.-.-.-.:-...`..:.:````````````     .```  `.``-       
  `.-..--...`..`````..````````````.`.``...`````.`.-...........-::..-...```-.`:`       
`-/+-````           `             `               `            -:...:-/:--:-:-/--.`   
.-//.````     `   ` `             `               `            -:`` :-:--:-::/o///:`  
  .-:..-..`````````````` `        `     `         `      ` ````-:-----:-.-:-.:.``     
       ```````..`................-----::/:------:-/-.........``..``.` `   `. -`       
                                  ``..```.  ` .`:`-`                `.     `. :       
                                   `..-`` `...----`.                  ```` `....      
                               --.-..:--.``:` .--/.:                   `.`` `-`:      
                              `:`:+://++:-`````.-: :                     `.` `:`:     
                               :-`--.-....-.````.-/:.                     `.` -::`    
                                         `.:.`.``.:.-`                      ...:..{a} 
                                          `..-`.``./.:                                
                                            .-:.. `./.-                               
                                             `.:.` `./.-                              
                                               .--` `./--{a}                             
                                                ..:. `-:+.                            
                                                 `-:. `: :`                           
                                                   .-- `: /`                          
                                                    .-:``:`/                          
                                                     `./.-::/                         
                                                       ......`{a}  """

TEXT = tuple(TEXT.format(a=('*' if t else ' ')).split('\n') for t in range(2))

from shutil import get_terminal_size
from time import sleep
from os import popen
from signal import signal, SIGINT

def out(*xargs):
    print(*xargs, sep='', end='')

def setx(x):
    out('\x1b[', x + 1, 'G')

def setxy(x, y):
    out('\x1b[', y + 1, ';', x + 1, 'H')

def down():
    out('\x1b[1B')

def clear():
    out('\x1b[2J')

def draw(t, x=0):
    setxy(0, h//2 - len(t)//2)
    for line in t:
        if x >= 0:
            setx(x)
            out(line[:w - x])
        else:
            out(line[-x:])
        print()

if __name__ == '__main__':
    signal(SIGINT, lambda a, b: None)
    h, w = (int(i) for i in popen('stty size', 'r').read().split())
    x = w
    clear()
    while x > -len(TEXT[0][0]):
        draw(TEXT[(x % 40) < 16], x)
        x -= 1
        sleep(0.05)