local printer = peripheral.wrap("printer_0")

if printer.getPaperLevel() == 0 then -- If there is no paper in the printer
  error("There is no paper in the printer!")
end

if printer.getInkLevel() == 0 then -- If there is no ink in the printer
  error("There is no ink in the printer!")
end

-- There is paper and ink in the printer, we can now print a page

if printer.newPage() then
  printer.write("Tasks:")

  printer.setCursorPos(1, 3)
  printer.write("* Check melon farm")

  printer.setCursorPos(1, 4)
  printer.write("* Get more ender pearls")

  printer.setPageTitle("Tasks")
  printer.endPage()
else
  error("Page could not be created.")
end