So I received a question about how to copy code in general. I made my first video and instead of posting it here and taking up the limited amount of memory that WordPress allows, I posted it at YouTube.com
This will show how to save LISP code that you find from the internet into a lisp file. This is only a quick way to make the LISP file and test it in AutoCAD. This is not the way to load LISP routines every time you open AutoCAD.
Click HERE to watch the video.
~enjoy
AutoCAD Tips 
Hello Greg, I am new to AutoCAD 2014. I have been designing some 3D solids, and recently when my cursor is placed over a solid object black lines appear then disappear when the cursor is moved. I can not figure out what has changed. I’m sure it’s something simple. Please help!
Thank you for taking the time to teach so many newbies like myself.
Paul,
Thanks for visiting my blog. I am happy that you find it useful.
The first things that comes to mind is that maybe your video card is out of date or that the “Hardware Acceleration” is turned off.
You can use the 3DCONFIG command to check the viedo card from within AutoCAD and then turn on the hardware acceleration in the lower right of the AutoCAD window.
Check out the following link in the 5th post. I made some screen shots that describe how to do this
http://forums.autodesk.com/t5/AutoCAD-2013-2014-DWG-Format/trouble-with-dyn-input/m-p/4610377/highlight/true#M37278
~Greg