# File karel/tk_robot_world.rb, line 337
  def dump_display(display, startStreet, startAvenue,  streetsTowardNorth, avenuesTowardEast)
    lines = []
    i = 2 * streetsTowardNorth
    while i >= 0 
      if startAvenue == 1
        line = " |"
      else
        line = " "
      end
      for j in (0..2*avenuesTowardEast)
        line += display[i][j]
      end
      lines<<line
            i -= 1
        end
        lines<<""
        lines<< "Lower left corner is street: " + startStreet.to_s + " avenue: " + startAvenue.to_s + "."
        lines<<""
        lines.each{|aline| print aline + "\n"}
           
        nil
    end