So all you want is to have a progress indicator that has different colors based on it's "time in the movie?"
IMO the way to achieve the color would be to first program your Slider by checking out this tutorial http://docs.oracle.com/javafx/2/ui_controls/slider.htm
Now I believe based on your tick marks, and blocks, you can create a .css file to change the colors of the slider at different intervals. Imo it would be 2 or so different colors(it seems like you have a green section, and a red section) that would be created in the css file, and at the certain tick mark you would have an if statement like
Color = red
else if(tickMark > 10) // or just else
You could have have the colors fade in better and such, but that's how I would approach this.