Question regarding Chanukah?

From what I understand Chanukah starter Dec 22nd and goes until Dec 30th

If from the first sunset on the 22nd you lit the candle. Tomorrow on the 29th all the candles should be lit but what happens on the 30th when all the candles have already been lit?

Does my question make sense? I can’t find this on google so I was hoping someone could explain like i’m 5.

Thanks in advance!