Make Snake Crawling animation in Power point

Open the blank document and make a circle using autoshape



Now open Custom Animation From Slide Show


Select Add Effect > Motion path > Curve to draw the path for animation





Make Multiple copies of above this can be done simply using Copy and Paste



Put all this copy in one place so that they completely overlap each other.



Make all the copies Start with previous in custom animation



Right Click and select Show advanced Timeline



Decrease the timing of each shape by 0.1 sec.

Then you can see the animation of snake like crawling.

see also 1
http://www.ellenfinkelstein.com/powerpoint_tip_anim_path_effects.html