open OFC

let () =
  let c = new_chart() in
  chart_set_title c "My Line Chart 2";
  let lg1 = new_line_elem() in
  let lg2 = new_line_elem() in
  line_elem_add_ints lg1 [ 8; 9; 7; 4; 3; 5; 6; 2; 1; ];
  line_elem_add_ints lg2 [ 3; 5; 6; 2; 1; 8; 9; 7; 4; ];
  chart_add_elements c [Line lg1; Line lg2];
  print_chart c;
;;