I concur with the answers you already got from helphand and kiat; and I like to stress one point: You need HTML::Template or something like this sooner than you now know!

It is not feasible to have a template for every single case of "it should look so and so"; simple conditionals and loops are essential to be able to really seperate code from look

Though I prefer Template::Toolkit, HTML::Template is more than adequate and, as said before easy to install.