I am trying to set the RSS feed with AMPscript in my email and I am pasting the whole script in the content area of the email template, i am successfully able to pull it in my email however it is unformatted i.e I cannot trim the content to say only display 4 lines of description in the email.  Is it possible to do it?

Script I used from here:https://developer.salesforce.com/docs/atlas.en-us.noversion.mc-programmatic-content.meta/mc-programmatic-content/rssFeedEmail.htm

Thanks