# File gtk/sample/gtk-demo/cairo-self-intersect.rb, line 19
    def draw(cr)
      cr.move_to(0.3, 0.3)
      cr.line_to(0.7, 0.3)
      
      cr.line_to(0.5, 0.3)
      cr.line_to(0.5, 0.7)
      
      cr.set_line_width(0.22)
      cr.set_line_cap(Cairo::LINE_CAP_ROUND)
      cr.set_line_join(Cairo::LINE_JOIN_ROUND)
      cr.stroke
    end