So, a while back I found a screensaver which is meant for the command
line. It is called tss. The
latest version is 0.8.1, and it is looking pretty cool.
Under screen 4.0 or higher, there is a command called idle which is
set in seconds. By default, it uses screen’s built in lockscreen
function, but if you define the environment variable LOCKPGR, then you
can call something else. I have it call a the following script:
#!/bin/bash tss -r exec vlock -a
This will lock my screen after a set time, and give me a nice thing to
look at. 