[R] help with gradient boxplot

[Fix Ace]

Hello, there,
I will like to fill the boxplot with gradient color, as exampled below:

Can anyone help me figure out what package I should go with?
Thank you very much for any inputs!
Kind regards,
Ace
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 72026 bytes
Desc: not available
URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20161206/27d24464/attachment.png>