[LUA] [Error]

function resetScreen(quitQ,numberMade,label) -- function that resets the screen
    term.clear()		   -- clears terminal
    term.setCursorPos(1,1) -- sets cursor's position
    if quitQ == true then  --if quitQ is true, which starts out as false at line 10
	    if label == nil then
		    print("Current disk label: numerical")
	    elseif label == 0 then
		    print("Current disk label: None")
	    else
		    print("Current disk label: "..label)
	    end
	    print("Copies Made: "..tostring(numberMade)) -- prints total made
	    print("Press L to change the label.")
	    print("Press C to change the copying operation.")
	    print("Press Q to quit.")
    end
end

function labeler()
    while true do
	    resetScreen()
	    print("How would you like label the disks?\n(Enter number for selection.)")
	    print("1: Number (1, 2, 3..etc.)")
	    print("2: Custom Label")
	    print("3: No label")
	    local whatDo = read()
	    if whatDo == "1" then
		    label = nil
		    break
	    elseif whatDo == "2" then
		    resetScreen()
		    write("Enter the label: ")
		    label = read()
		    break
	    elseif whatDo == "3" then
		    label = 0
		    break
	    else
		    resetScreen()
		    print("Not a correct input, try again")
		    sleep(2)
	    end
    end
    resetScreen(quitQ,numberMade,label)
end

function copyChange()
    while true do -- file I/O
	    resetScreen()
	    write("File to Copy: ")
	    fileIn = read()  -- input file
	    write("Location/Name to copy to: ")
	    fileOut = read() -- output file
	    if fs.exists(fileIn) == false or fs.exists(fileOut) == true then -- if input file isn't there or if output file already exists
		    resetScreen()
		    print("Invalid inputs! Try again.")
		    print("(Maybe file incorrect file to be copied or file to be created is already there?)")
		    sleep(2)
	    else
		    break
	    end
    end
    resetScreen(quitQ,numberMade,label)
end

local side = ""	  -- side disk drive is on
local numberMade = 0 -- keeps track of how many were made
local quitQ = false  -- quitQ is going to be short for quit-Question, meaning if false,
					 --   do not display the option to quit yet until able to
					 
resetScreen(quitQ)
print("Insert a disk into the drive to be used.")
while true do
    local event, param = os.pullEvent()
    if event == "disk" then
	    side = param
	    break
    end
end

labeler()
copyChange()
quitQ = true -- sets quitQ to true
				    -- it's always a good idea to keep comments orderly like you see here and above

while true do
    resetScreen(quitQ,numberMade,label)
    event, param = os.pullEvent()
    if event == "disk" then
	    if fs.exists(fileOut) == true then -- if the file is already there (can't overwrite with cp!)
		    print("File already there! Please insert another disk.")
		    print("Press any button to eject and continue.")
		    while true do
			    local event = os.pullEvent()
			    if event == "char" or event == "key" then
				    disk.eject(side)
				    resetScreen(quitQ,numberMade)
				    break
			    end
		    end
	    else
		    fs.copy(fileIn, fileOut) -- copies with variables
		    if label ~= nil and label ~= 0 then
			    disk.setLabel(side, label)
		    elseif label == 0 then
			    ---
		    else
			    disk.setLabel(side, tostring(numberMade + 1))
		    end
		    numberMade = numberMade + 1 -- add one to the count
		    disk.eject(side)
		    resetScreen(quitQ,numberMade,label)
	    end
    end
    if event == "char" and param == "l" then
	    labeler()
    elseif event == "char" and param == "c" then
	    copyChange()
    elseif event == "char" and param == "q" then -- test if quit button was pressed
	    break -- break exits the loop; jumps right down to the 'print'
    end
end

quitQ = false
resetScreen(quitQ)
print("Bye!")
sleep(1)
resetScreen(quitQ)