Needing adice?

okay so im 15 and i know someone who woreks in to music biz and they want me to recorda demo of my music from home to give to them, and if theylike what they hear they want to get the record companys interested, however, i havent finished the songs ive written as of yet, i mean i havent really sung along with them, ive written the song but havent done much else and he has only given me a month at the most to have a demo recorded and read for him to listen to and then take it from there. What am i meant to do? ive written the songs down on paper but havent really done any singing/music for the songs ive written? and i dont have much time to put the demo toagther....what do you think i should do?