line art moving?

[SodaPopJammies]

examples can be animations from Oney, like Leo and Satan, Fyat-

you know those characters in those shorts that when they stand still, the lines on the charcters ( line art) move on its on, not too much but a little, to make the characters look alive, or moving a bit even when its not making any movement.

how do you make that effect? i see popular flash artists use the same techniques

more examples can be Assumption Song, and Egoraptured.

[BoiledRabbitsFeet]

Select your line in flash and click smooth, then next frame click the line and repeat.