barchart with stacked and beside bars

I want n0 side by side then a gap and then n96 like in the first script
"barplot(bio,beside=T)"

I have done it in Excel but I had to put in some artifical zeros to produce
the gap and i will have to change the axis labels, but i was wondering if
there was a neater way of doing it in R

http://n4.nabble.com/file/n1049632/graph%2Bexample.png

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