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@erikrose
Last active December 26, 2015 00:29
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Open-source Halloween! Here's a spooky light show. Just `pip install blessings` and then run the script in any terminal. At the moment, it rotates between lightning-like flashes in various colors and gentle gradient pulsing. Put it in a window with the blinds down, and it diffuses nicely. Laptops are bright! Contribute your own effects in the co…
#!/usr/bin/env python
from itertools import chain
import random
from random import randint
from time import sleep, time
from blessings import Terminal
t = Terminal()
# Gradients of various hues, in darkest-to-brightest order:
gradients = [[t.on_color(x) for x in 16, 22, 28, 34, 40, 46],
[t.on_color(x) for x in 0, 19, 20, 21, 27, 33, 39, 45, 51],
[t.on_color(x) for x in 52, 53, 54, 55, 56, 57, 63, 69, 75, 81]]
def paint_screen(color):
with t.location(0, 0):
print color('\n'.join((' ' * t.width) for h in xrange(t.height + 1))),
def fade_effect():
colors = random.choice(gradients)
delay = random.choice([.04, .06])
while True:
for color in chain(colors, reversed(colors)):
paint_screen(color)
sleep(delay)
yield
def flash_effect():
color = random.choice([t.on_color(c) for c in 46, 27] + [t.on_bright_red])
while True:
sleep(randint(3, 5))
for _ in xrange(randint(2, 5)):
paint_screen(color)
sleep(0.1)
paint_screen(t.on_black)
sleep(randint(1, 5) / 10.0)
yield
def make_timer(duration):
start = time()
def time_is_up():
return time() - start >= duration
return time_is_up
def main():
effects = [v for k, v in globals().iteritems() if k.endswith('_effect')]
while True:
paint_screen(t.on_black)
effect = random.choice(effects)()
time_is_up = make_timer(randint(8, 8))
while not time_is_up():
next(effect)
if __name__ == '__main__':
main()
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