Macbook won't boot on Yosemite

Model identifier: MacBook6,1 OS: 10.10 Yosemite

Issue: Macbook suddenly froze while I was using Google Chrome so I waited for 15 minutes hoping it would un-freeze. After 15 minutes, I decided to force-power off by pressing and holding the Power button. When I tried to turn it on again, I heard the chime, but the screen remained white, and the hard drive started making clicking noises.

I've tried all sorts of things and I've lost track of what I have and haven't tried.

All suggestions would be great :)