Kinescope

This allows you to capture the bitmap of the active window and play it back.

(C)apture
takes a snapshot of the currently active window
(R)eset
deletes all the snapshots
(P)layback
cycles thru the pictures each time you click the left mouse button and stops if you click the middle or tap Esc . It will beep when done.
(A)utoplay
continuously plays back snapshots. You tell it how many cycles and how much time between frames in milliseconds.
(S)ave
saves the frames in either ppm or gif format
(M)ake anigif
Create an animated gif from the frames. The file is always called anim.gif and can be played with Netscape, Explorer, xanim, etc.