The Matrix

matrix.sh

# vid: https://vimeo.com/248529140
# tweetable versions:
#   https://twitter.com/josh_cheek/status/1013189676008722433
#   https://twitter.com/josh_cheek/status/1013182568307535873
ruby -r io/console -e '
   h, w = $stdin.winsize
   time = []
   def time.[](i)
     super || (
       moment = {green: [], white: [], off: []}
       self[i] = moment if 0 <= i
       moment
     )
   end
   def time.shift
     self[0]
     super
   end

   chars = [*32.chr..126.chr]
   print "\e[?25l"
   at_exit { print "\e[?25h"; exit! unless $! }

   loop do
     now = time.shift
     if rand < 0.2
       y, x = 0, 1 + rand(w)
       rate = (rand*10).to_i+1
       len  = rand(30) + 5
       1.upto(h+len) do |y|
         time[y*rate][:white] << [y, x]
         time[y*rate][:green] << [y-1, x]
         time[y*rate][:off]   << [y-len, x]
       end
     end
     to_ansi = -> pairs, chars { pairs.reject { |y, x| y <= 0 || h < y }.map { |y, x| "\e[#{y};#{x}H#{chars.sample}" } }
     print "\e[0m",  to_ansi[now[:off],   [" "]].join
     print "\e[37m", to_ansi[now[:white], chars].join
     print "\e[38;5;#{[22, 28, 34, 40, 46].sample}m", to_ansi[now[:green], chars].join
     sleep 0.001
   end'