After Effects Walk Loop in half the time. 

We all hate Adobe, but have you tried using Adobe After Effects? When it comes to animating a walk cycle, it’s faster than most other programs. With my tips, you can get it done in half the time.
Yuu can find the proper code in the comments, as RU-vid does not allow angled brackets in video descriptions.
x = REPLACE ;
if (time ⋗ 20 / 30) { // change the "⋗" with the corrosponding angled bracket
x.valueAtTime(time - 20 / 30);
} else {
x.valueAtTime(time + 20 / 30);
}