Computer Craft: ClickGUI

function Println(x,y)
  term.setCursorPos(1,x)
  term.write(y)
end
function PrintBlankMenu()
  Println(1, "X-------------------------------------------------X")
  Println(2, "|                                                 |")
  Println(3, "|                                                 |")
  Println(4, "|                                                 |")
  Println(5, "|                                                 |")
  Println(6, "|                                                 |")
  Println(7, "|                                                 |")
  Println(8, "|                                                 |")
  Println(9, "|                                                 |")
  Println(10, "|                                                 |")
  Println(11, "|                                                 |")
  Println(12, "|                                                 |")
  Println(13, "|                                                 |")
  Println(14, "|                                                 |")
  Println(15, "|                                                 |")
  Println(16, "|                                                 |")
  Println(17, "|                                                 |")
  Println(18, "|                                                 |")
  Println(19, "X-------------------------------------------------X")
end

PrintBlankMenu()
local _,type,x,y = os.pullEvent("mouse_click")