Rolling Score? Help Please...

I've got a super big project I'm working on, I need to know how to create a 'rolling' score, basically what it is is when an event happens that makes a score go up (like collecting a coin or something) the score will increase by 100. But I need to make the score increase by 1 until it reaches 100, I saw TShirtBooth's Tutorial by it only works if the score is going up randomly every time. Help Please?

Comments
I just figured it was user error and it wasn't super critical for my game so I didn't spend time trying to find the issue.