Toss = [:Heads, :Tails]

def yourChoice
  puts "Enter your choice (H/T)"
  choice = []
  3.times do
    until (c = $stdin.getc.upcase) == "H" or c == "T"
    end
    choice << (c=="H" ? Toss[0] : Toss[1])
  end
  puts "You chose #{choice.join(' ')}"
  choice
end

loop do
  puts "\n%s I start, %s you start ..... %s" % [*Toss, coin = Toss.sample]
  if coin == Toss[0]
    myC = Toss.shuffle << Toss.sample
    puts "I chose #{myC.join(' ')}"
    yC = yourChoice
  else
    yC = yourChoice
    myC = Toss - [yC[1]] + yC.first(2)
    puts "I chose #{myC.join(' ')}"
  end

  seq = Array.new(3){Toss.sample}
  print seq.join(' ')
  loop do
    puts "\n I win!" or break   if seq == myC
    puts "\n You win!" or break if seq == yC
    seq.push(Toss.sample).shift
    print " #{seq[-1]}"
  end
end