My MultiLineString currently is styled like this:

```
'MultiLineString': new Style({
    stroke: new Stroke({
        color: 'green',
        width: 1
    })
}),

```

And the coordinates for my MultiLineString looks something like this:

```
[
[[3, 8], [4, 10], [5, 12]],
[[2, 4], [3, 8], [4, 10]]
]

```

where there is some overlap in the data. I want to scale the width of the line where the data overlaps to help illustrate that the line is being gone over multiple times. I'm guessing I need to utilize the [RenderFunction()](https://openlayers.org/en/latest/apidoc/module-ol_style_Style.html#~RenderFunction), but I'm having a hard time understanding what to do next. 

Any help would be greatly appreciated.