gistfile1.rb

class Robot
 
  def initialize
    @coordinates = [0, 0]
    @fired_at = []
  end

  def forward(n)
    @coordinates[0] += n
    puts @coordinates, "-----"
  end

  def backward(n)
    @coordinates[0] -= n
    puts @coordinates, "-----"
  end

  def right(n)
    @coordinates[1] += n
    puts @coordinates, "-----"
  end

  def left(n)
    @coordinates[1] -= n
    puts @coordinates, "-----"
  end


  def fire
    @fired_at.push(@coordinates)
    puts @coordinates
    puts @fired_at, "-----"
  end

end

Robot.new.instance_eval do
  def do_nothing
    forward 1
    backward 1
  end   

  do_nothing
  right 6
end