Direct 2D gnuplot PNG animation?

Can anyone please confirm that yes/no Gnuplot 4.5 (on CVS) can output 2D animated PNG files? I have numerous datasets but one line that I'd like to show iteratively in 3 different places in my graph. Can this be done directly from gnuplot or is this something that would need to be animated externally from multiple 开发者_JS百科frames?

You can find the demo scripts for the CVS version here. There is a C2Gnuplot for creating gnuplot animations (self-advertisement: it was developed by me).