Doing heart meter

Hi, can someone teach me how i can make the heart meter (those kind you find in hospital, normally in movies where the patient is in critical condition and the meter goes “deeeeeeeeeee”).

I tried using lines, but the line doesn’t seems to be moving. It’s jus a straight line on the screen while i did the motion tween.

This might help… I think…

http://www.kirupaforum.com/forums/showthread.php?s=&threadid=34189