file copy form disk to startup on pc computercraft

local filedir = ""
local filedest = ""
local confirm = false
local install = false
function text()
    term.setCursorPos(13, 7)
    print("this will create a startup.")
    term.setCursorPos(14, 8)
    print("do you want to continue?")
end
function confirmation()
    term.setCursorPos(18, 10)
    local event, key, isHeld = os.pullEvent("key")
    if key == keys.left then
        write(">Yes<     No ")
        confirm = true
    elseif key == keys.right then
        write(" Yes     >No<")
        confirm = false
    end

end

term.clear()
term.setCursorPos(18, 10)
print(" Yes     >No<")
while install == false do
    text()
    confirmation()
    local event, key, isHeld = os.pullEvent("key")
    if confirm and key == keys.enter then
        install = true
    end
end
fs.copy(filedir, filedest)
term.clear()
term.setCursorPos(1, 1)
print("installed")