functions_reputation change, please help

[dutchbb]

I would like to change the reputation points distribution a bit. I've found the file and code to edit but I'm stuck changing it to what I want:

PHP Code:

    if ($reputation_value > 500)
    {  // bright green bars take 200 pts not the normal 100
        $reputation_value = ($reputation_value / 2) + 250;
    }

    $reputationbars = intval($reputation_value / 100); // award 1 reputation bar for every 100 points
    if ($reputationbars > 10)
    {
        $reputationbars = 10;
    } 


What I would like to achieve:

For the first green bar is needed: 125 points
second and following bars: 500 points

then after 3000 points 1 bar for every 1000 points
and after 8000 points 1 bar for every 1500 points

I tried but I'm not sure how this works.

(if anyone would like to makes this a mod, feel free to do so. would be great if any number of points could be used in control panel).