from random import randint
from asciimatics.screen import Screen
def demo(screen):
while True:
screen.print_at('Hello world!',
randint(0, screen.width), randint(0, screen.height),
colour=randint(0, screen.colours - 1),
bg=randint(0, screen.colours - 1))
ev = screen.get_key()
if ev in (ord('Q'), ord('q')):
return
screen.refresh()
Screen.wrapper(demo)