Hackety-Hack interactive hangman

hangman.rb

def circle(size)
  for i in (1...360)
    forward size
    turnright 1
  end
end

def draw_gallows
  goto 150, 300
  setheading 270
  forward 150
  turnleft 180
  forward 25
  turnright 90
  forward 200
  turnleft 90
  forward 70
  turnleft 90
  forward 20
end

def draw_head
  goto 184, 141
  setheading 0
  circle 0.35
end

def draw_body
  goto 204, 159
  setheading 0
  turnleft 180
  forward 60
end

def draw_left_arm
  goto 204, 189
  setheading 55
  forward 35
end

def draw_right_arm
  goto 204, 189
  setheading -55
  forward 35
end

def draw_left_leg
  goto 204, 219
  setheading 130
  forward 40
end

def draw_right_leg
  goto 204, 219
  setheading -130
  forward 40
end

Turtle.draw do
  #para "Hangman Game"
  draw_gallows

  letters = []
  word    = ['salut', 'bonjour', 'supercalifragilisticexpialidiosius'].sample
  errors  = 0

  para ('-' * word.size + "\n")

  keypress do |letter|
    letters << letter

    if not word.include? letter
      errors = errors + 1
      draw_head      if errors == 1
      draw_body      if errors == 2
      draw_left_arm  if errors == 3
      draw_right_arm if errors == 4
      draw_left_leg  if errors == 5
      draw_right_leg if errors == 6
    end

    display_word = word

    word.each_char do |letter|
      if not letters.include?(letter)
        display_word = display_word.gsub(letter, '-')
      end
    end

    para "#{display_word}\n"
  end
end