is it possible to make a simple swim animation, in my case I cut the characters in half and put a blue trail with opacity simulating the swim for the character, but basically the character just kind of walks slowly while moving through the water, it looks funny, but I would like to know how you would do it. 

PS: I have the program on steam and I appreciate that it updates just as fast as the one here, it helps me a lot, great job.  :D