If te were stranded on a deserted island, what one thing would te bring with te and why?

Gosh...that's really hard. I suppose a phone with WiFi connection so I could phone home wouldn't be very realistic...XD Well...my first thought was to bring my drawing stuff like my sketchpad and pens so I could draw all the animali and birds on the island (and write messages to put in bottles), but thinking about it they could easily run out/become damaged over time, and I could probably find natural pigments and stuff on the island and draw pictures on rocks and things. So I'd probably bring a musical instrument that I could play (or at least know how to play), like a Pianoforte o a harpsichord. I could get really, really good at playing the Pianoforte and create elaborate compositions without anyone disturbing me. Sure, I wouldn't have any Cibo and water, but I'd be one heck of a pianist XD I could then scratch the notes as sheet Musica into the walls of a cave o rock, and when people would come many centuries later they could see the notes and write them down for other people to play. Maybe it wouldn't save my life, but if I was to be stranded on an island I'd at least like people to know I was there.

A bridge back to the main land.