Help!! Please check this link to find the better clue of my question To Create Protovis Sunburst Charts : Python Script To Create Dataset In Json Format (Or) Parent - Child Json

Thanks for a.zielezinski for the python script. Hoping that you followed me previous question and got an idea about what I am talking. Yes, it's about Sunbursts charts from Protovis check here

Now going ahead with the Sunburst chart, the problem is - if you see the diagram the last peripheral nodes are coloured based on the function. (You can check it from the Protovis page link given above)

function update(method) {
  switch (method) {
    case "byte": partition.size(function(d) d.nodeValue); break;
    case "file": partition.size(function(d) d.firstChild ? 0 : 1); break;
  }
  vis.render();
}

I have the same excel file like this which is read using the python script and rewritten in json format as presented in my previous post. I have to use the following excel and use the final BEI_STATUS as the index for colouring the last peripheral nodes.

L1            L2          L3        L4         L5        GENE_NAME    BEI_STATUS
Ion channel    LGIC     CYS_LOOP    GABAA    ANIONIC    GABRD            1
Ion channel    LGIC     CYS_LOOP    GABAA    ANIONIC    GABRA3            1
Ion channel    LGIC     CYS_LOOP    GABAA    ANIONIC    GABRA6            1
Ion channel    LGIC     CYS_LOOP    GABAA    ANIONIC    GABRQ            1
Ion channel    LGIC     CYS_LOOP    GABAA    ANIONIC    GABRA5            1
Ion channel    LGIC     CYS_LOOP    GABAA    ANIONIC    GABRP            1
Ion channel    LGIC     CYS_LOOP    GABAA    ANIONIC    GABRA2            1
Ion channel    LGIC     CYS_LOOP    GABAA    ANIONIC    GABRB3            1
Ion channel    LGIC     CYS_LOOP    GABAA    ANIONIC    GABRG3            1

Writing data in json format is fine and easy, but the difficulty now here is how to change or re-write the function which is used to colour the peripheral nodes. I need help in changing the function specified above which can accommodate my parameter (BEI_STAUTS) for colouring. One thing should be noted here is graph should be ended till GENE_NAME and the colour of the GENE_NAME should be based on the numerical values in BEI_STATUS.

Any sort of help appreciated. Thanks in advance