Hello Dan!!! This code solved my problem! But composition reacting only when i move null object “x” how i can make reacting to y? I change all “x” to “y” in code but it doesn’t work:(((
y = thisComp.layer("Null 1").transform.position[0];
d = y - thisComp.width/2;
framesToTime(linear(d,200,-200,0,88))