Use XSLT to transform XML based on node count

[pielesowy]

I am looking to transform a node, based on the number of elements. i.e. 5, then close the node and re-open a new one. see example below\[code\]<root> <branch> <foo>bar</foo> <foo>bar2</foo> <foo>bar3</foo> <foo>bar4</foo> <foo>bar5</foo> <foo>bar6</foo> <foo>bar7</foo> </branch><root>\[/code\]Should become\[code\]<root> <branch> <foo>bar</foo> <foo>bar2</foo> <foo>bar3</foo> <foo>bar4</foo> <foo>bar5</foo> <branch> </branch> <foo>bar6</foo> <foo>bar7</foo> </branch><root>\[/code\]Please help on how this can be done in XSLT.