This is a morphing animation which depicts that a cannon-ball shot from a cannon breaks a pole and comes back into the cannon. The cannon-ball looks like something like a snake. I made it using Inkscape. This animation is implemented by attributeName="d" function of SMIL. Please reload to see it again.
Biological weapon-animation free icon was designed by yamachem for icons Png and presented to its users.
yamachem
2/5/2018