FFMpeg - How to move overlay a gif from point a to b

Question

FFMpeg - move overlay gif from a point a to b.

I used somebody posted here FFMpeg - move overlay from point a to b to c to d.

I modified it like this:

-i input.mp4 -ignore_loop 0 i example.gif \
filter_complex \
  [0][1]overlay=x='(200+(100-200)*(t-0)/5)between(t,0,5)':y='(0+(200-100)(t-200)/5)*between(t,0,5)' \
out.mp4

How can I move a gif overlay of a video, starting from a's coordinate points to given b's coordinate points?

Gif should move in given time (seconds) and stop move on given b points and keep visible of entire video.

Please suggest.

Thanks.