Nothing
### add alpha.transparency to given color
addAlphTrsp2col <- function(col, alpha=255){
do.call(rgb,as.list(c(col2rgb(col)[,1],max=255,alpha=alpha)))
}
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.