HELP!

I am a musician and writer who need some help!
I am working on my 3rd screeplay CUFIP (currently untitled film in progress) and I wish to compose my own music, but i dont know how or what i need.









<Added>

note the music i put up there is NOT what i am composing, i just like it =)
i started my first composition yesterday =\ guess its ok

Can try to compose your own using any music composing software. Suggests FlexiMusic Composer, a multi-track program for composing, editing and mixing of music using sampled instrument sounds.
http://www.fleximusic.com/composer/overview.htm

Try pianosheets.org for help.....