text displayer script for computercraft

-- function to check for the file
function fileExists(fileName)
    local file = fs.open(fileName, "r")
    if file then
        file.close()
        return true
    end
    return false
end

-- name of the file that will display the text
local fileName = "text.txt"

-- connect monitor to console
local monitor = peripheral.wrap("top") -- top, bottom, left, right

if monitor then
    -- clear monitor and reset text position
    monitor.clear()
    monitor.setCursorPos(1, 1)
    -- text size, text color and monitor background color https://computercraft.info/wiki/Colors_(API)
    monitor.setTextColor(1)
    monitor.setTextScale(1)
    monitor.setBackgroundColor(32768)

    -- checking for file
    if fileExists(fileName) then
        -- open file
        local file = fs.open(fileName, "r")

        -- reading the file
        local lines = {}
        while true do
            local line = file.readLine()
            if line == nil then break end
            table.insert(lines, line)
        end

        -- file close
        file.close()

        -- file display
        for i, line in ipairs(lines) do
            -- if the line is not empty then display
            if line ~= "" then
                monitor.write(line)
                local x, y = monitor.getCursorPos()
                monitor.setCursorPos(1, y + 1) -- next line
            end
        end
    else
        monitor.write("Display file not found.")
    end
else
    print("Monitor not connected.")
end