A multi-colored blessed screensaver

bouncy.py

from blessed import Terminal
from colorsys import hsv_to_rgb
from time import sleep
from random import randrange, choice
from sys import stdout

# Print with no trailing newline
def printn(*args, **kwargs):
    kwargs['end'] = ''
    print(*args, **kwargs)

if __name__ == "__main__":
    term = Terminal()

    all_chars = r"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789`~!@#$%^&*()_+-=[]{}\|;':,./<>?"
    printn(term.clear + term.home)
    hue = 0

    width, height = term.width, term.height

    pos_x, pos_y = randrange(width), randrange(height)
    vx, vy = 1, 1

    with term.hidden_cursor():
        while True:
            # printn(term.move_xy(pos_x, pos_y))
            # printn(" ")

            pos_x, pos_y = pos_x + vx, pos_y + vy
            if pos_x < 0:
                pos_x = 1
                vx = 1
            elif pos_x >= width:
                pos_x = width - 2
                vx = -1
            if pos_y < 0:
                pos_y = 1
                vy = 1
            elif pos_y >= height:
                pos_y = height - 2
                vy = -1
            
            printn(term.move_xy(pos_x, pos_y))

            red, green, blue = hsv_to_rgb(hue / 255, 1, 1)
            color = term.color_rgb(int(red * 255), int(green * 255), int(blue * 255))
            printn(term.bold(color(choice(all_chars))))

            hue = (hue + 7) & 0xff
            stdout.flush()
            sleep(0.001)