Select last child when odd, 2 last childs when even

Question

I\'m in a situation where the number of elements showed is variable, and I need a strange solution which I\'m not able to achieve, I even doubt if it\'s achievable only with

Answer 1

Absolutely it can be done, with pure CSS. See the complete code below (odd child, last child red; even childs, last 2 childs green)

Click

This is one.     
 This is two.    
 This is three.  
 This is four.   
 This is five.   
 This is six.    

Enjoy, the coding ;)