test_color.py

#! /usr/bin/env python3
#
# Copyright (c) 2016, Gabriel Linder <linder.gabriel@gmail.com>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
#

INC_COLOR = 24
r, g, b = 0, 0, 0

while b <= 255:

    print('\033[38;2;{};{};{}m\u2588\033[0m'.format(r, g, b), end='')

    r += INC_COLOR
    if r > 255:
        r = 0
        g += INC_COLOR
        if g > 255:
            g = 0
            print()
            b += INC_COLOR