4 directional movement with mouse

okay, i asked this in the animation forum, but i realized afterward that that forum has very little activity. there's still a thread from 2015 on the front page, and it has only 15 replies. so i hope the moderators will allow me to ask this question here:

https://hastebin.com/epiyamoqot.cs

here's my script. i set up the triggers with those names in the animator view. the behavior i see is that the idle animation plays for a second or two then stops. then when i move around there is no animation, just the sprite renderer sprite.

http://s1302.photobucket.com/user/george_young4/media/Capture6_zpsiptpvt8j.png.html

any ideas how i can get this working?