Tape Downloader

--this program takes an argument in the form of a url to download to a tape
--2nd arg specifies where in the tape to start writing at
args={...}--{'https://kitomas.neocities.org/YMO-Tong_Poo6.txt'}
local tape=peripheral.find("tape_drive")
local multi=' '
local inc=6000
term.clear()
term.setCursorPos(1,1)
if #args > 0 then
    if tape then
        if tape.isReady() then
            print("Verifying URL...")
            local ok, err = http.checkURLAsync(args[1])
            if ok then
                print("Fetching URL contents... (This may take a while)")
                local request, err = http.get(args[1],nil,true)
                if request then
                    print("Preparing Tape Drive...")
                    os.sleep(.2) --so that you can see the text before the screen clears
                    local counter,yield=0,0
                    local size=tape.getSize()
                    tape.stop()
                    tape.seek(-size-9999)
                    if tonumber(args[2]) ~= nil then tape.seek(tonumber(args[2])) end
                    while counter < size and multi ~= nil do
                        term.setCursorPos(1,3)
                        term.write("Writing: "..counter.."/"..size.."                        ")
                        multi=request.read(inc)
                        if multi ~= nil then
                            tape.write(multi)
                            counter=counter+multi:len()
                        end
                        yield=yield+1
                        if yield > 60 then
                            os.sleep(.05)
                            yield=0
                        end
                    end
                    tape.seek(-size-9999)
                    term.setCursorPos(1,3)
                    term.write("Writing: "..counter.."/"..size.."                            ")
                    print("-DONE-")
                    request.close()
                else
                    printError(err)
                end
            else
                printError(err)
            end
        else
            printError("Place a tape into the Tape Drive's tray plz")
        end
    else
        printError("Attatch a Tape Drive to this computer plz")
    end
else
    printError("Plz add a direct file URL as an argument")
end