Posts pagination without plugin

Hey, Iwould like to have a pagination in my posts without a plug-in. My siderbar looks like this:

<?php get_archives(‘postbypost’, ’10’, ‘custom’, ”, ”); ?>

Then thepost 11, 12… is not show. So, will be great how to modificate the code to have some next and back option to have a pagination.

Is it posible guys?

Thanks!