Congrats on level 34! To do exactly what you said, you're going to want your macro to look like this:

/micon "Eye for an Eye"
/ac "Eye for an Eye" <t>
/wait 1
/ac "Virus" <tt>


You're gonna need that /wait in there because, even though they're both instant abilities, there's still a tiny bit of animation lock.

Happy macro writing!