Swiss stay for 4 days: Itinerary help!

Hi,
I am planning to visit Switzerland and I have 4 full days to make or see as much as I can.
I am reaching Basel on a Friday night.
I have my train from Lucerne to Milan booked on Wednesday early morning.
Now I want to see jungfraujoch, zermett and also swiss villages.

Please suggest me an itinerary which will help me to do so!
Day 0 night- reaching Basel
Day 1 - ?
Day 2 - ?
Day 3 - ?
Day 4 - have to be in lucerne
Day 5 - leave Lucerne early morning.
Please help!!

I am not sure about Mt. Titlis. ALso help regarding the swiss pass i should take.

Thanks