Display content between squares with links
What you want to do can be easily accomplished with JavaScript and CSS. And. since Drupal already ships with jQuery, you could make use of the slideToggle() effect to slide up and down your content. 

I'll give you a general idea:


In Drupal, create a page that displays your 3 nodes. For example, you could create a View and show the Title and Body fields of your articles.
In your JavaScript, hide the Body field by default and then add a click event to your Title field, so when users click on it, the following Body field slides down or up.

$('#title-one').click(function() {
    $('#body-one').slideToggle();
});



Of course, this is just a starting point and one way of doing it. Good luck!