More rules (images @ https://twitter.com/josh_cheek/status/939334887076704256)

consider-2-rows-of-3-random-init.sh

ruby -e '
   require "io/console"
   print "\e[?25l"
   at_exit { print "\e[H\e[2J\e[?25h" }
   seed = 0
   loop do
     rule = Random.new(seed).rand(2**64)
     nrows, ncols = $stdin.winsize
     rows = [Array.new(nrows*2+ncols/2+2, 0), Array.new(nrows*2+ncols/2, 0)]
     rows.each { |r| rand(5).times { r[rand r.size] = 1 } }
     to_print = ""
     nrows.times do |i|
       cells1, cells2 = rows
       cells  = cells2[nrows-i, ncols/2]
       slices = cells.zip([0]+cells).slice_before { |l, r| l != r }.map { |row| row.map &:first }
       to_print << "\e[#{i+1}H"
       slices.each { |slice| to_print << "\e[4#{slice[0]}m" << ("  "*slice.size) }
       rows = [
         cells2,
         cells1[1...-1].zip(cells2).each_cons(3).map { |(a,d),(b,e),(c,f)| rule[a*32+b*16+c*8+d*4+e*2+f] },
       ]
     end
     to_print << "\e[H\e[97;44mseed #{seed} | rule #{rule}\e[49;34m (press j/k/q)\e[0m"
     $stdout.write to_print
     $stdout.flush
     input = $stdin.getch
     next seed += 1 if input == ?k
     next seed -= 1 if input == ?j
     break if %W[\C-c \C-d q \e].include? input
   end'

consider-2-rows-of-3.sh

ruby -e '
   require "io/console"
   print "\e[?25l"
   at_exit { print "\e[H\e[2J\e[?25h" }
   seed = 0
   loop do
     rule = Random.new(seed).rand(2**64)
     nrows, ncols = $stdin.winsize
     rows = [Array.new(nrows*2+ncols/2+2, 0), Array.new(nrows*2+ncols/2, 0),]
     rows[-1][rows[-1].size/2] = 1
     to_print = $stdout
     nrows.times do |i|
       cells1, cells2 = rows
       cells  = cells2[nrows-i, ncols/2]
       slices = cells.zip([0]+cells).slice_before { |l, r| l != r }.map { |row| row.map &:first }
       to_print << "\e[#{i+1}H"
       slices.each { |slice| to_print << "\e[4#{slice[0]}m" << ("  "*slice.size) }
       rows = [
         cells2,
         cells1[1...-1].zip(cells2).each_cons(3).map { |(a,d),(b,e),(c,f)| rule[a*32+b*16+c*8+d*4+e*2+f] },
       ]
     end
     to_print << "\e[H\e[97;44mseed #{seed} | rule #{rule}\e[49;34m (press j/k/q)\e[0m"
     #$stdout.write to_print
     $stdout.flush
     input = $stdin.getch
     next seed += 1 if input == ?k
     next seed -= 1 if input == ?j
     break if %W[\C-c \C-d q \e].include? input
   end'

consider-5.sh

# based on looking at 5 instead of 3
ruby -rio/console -e '
   rule = (ARGV[0]||raise("PROVIDE THE RULE AS AN ARGUMENT!")).to_i
   loop do
     rows, cols = $stdin.winsize
     vals = Array.new rows*4 + cols/2, 0
     vals[vals.size/2-1] = 1
     rows.times do |i|
       print "\e[#{i+1}H", vals[rows*2-i*2, cols/2].map { |v| "\e[4#{v}m  \e[0" }.join
       vals = vals.each_cons(5).tap { |v|  }.map { |a,b,c,d,e| rule[a*16+b*8+c*4+d*2+e*1] }
     end
     print "\e[H\e[47;30mRULE #{rule}\e[0m"
     input = $stdin.getch
     if input == ?j
       rule += 1
     elsif input == ?k
       rule -= 1
     elsif input == q
       break
     end
   end
   ' -- 1208058119