Reading last line of textfile

Hello,

I am currently writing a flashscript that displays the contents of a text file.
I need to keep refreshing the data in the text file, because of data constantly being added to the text file.
Does anyone have a idea if it’s possible to read only the last line of text into flash?
(because of a data size of 65Kb + it’s impossible to just keep reading the text file over and over)