Upstart on Debian?

I created an upstart script in Ubuntu, thinking it would be the same for Debian. But Debian doesn’t have a /etc/init folder that Ubuntu has. I went to the upstart download page and seeing that they have packages, did a apt-get install upstart, but it asks to remove sysvinit, which I know will/might screw up my system. So how do I make my Ubuntu script work on Debian?