Just type this in your terminal:

% apt-get install telak
% mkdir ~/.telak
% echo -e '[debian-rc-bug]
url = http://bugs.debian.org/release-critical/graph.png
x = 100
y = 100
reverse = 1
refresh = 7200' \
>> ~/.telak/telakrc
% telak &

(reverse = 1 is only useful if you have a black background like me)