How to set up a turning animation?

I am trying to set up a turning animation with a little ship that I made.The animation blend speed is set between 2 and -2 on a 1D blend space. I have 3 variables (Is turning, Is turning Right, and Is Turning Left) Is turning has to be true with the desired direction variable as true to have the set direction animation play ( 2 or -2). I.E Is turning? and Is turning right? set to true, the right turning animation will play. However, if the player is in idle I want the speed to be cut in half.(1 or -1) I don’t know how to set the variables to true at the desired time to have the animations fire correctly or if I need more or less. BTW this is going to be set up with WASD controls.