[gentoo-user] pop up windows with text message

[Joseph]

How to design a sticky note pop-up when file is present?

I would like to check if file is present via and open a terminal window with a simple message.
I think a simple bash script and a cron job would do the trick or is there a better solution?

I've tried cron + bash script

cron:
32 10 * * * sh /home/joseph/xp_share/wall.sh

wall.sh
terminal
wall file ready

When I open terminal and type: "terminal" new windows pops up
But if close all the terminals and run wall.sh script the terminal will not open.
I get an error message: (terminal:24945): Gtk-WARNING **: cannot open
display:

-- 
Joseph