[Dan Ebberts]

You could start with something like this, where the array colors defines the repeating sequence of colors and the variable freq defines how fast the colors change:

var color1 = comp("XControl").layer("AAA").effect("White")("Color");
var color2 = comp("XControl").layer("AAA").effect("Orange")("Color");
var color3 = comp("XControl").layer("AAA").effect("Green")("Color");
var colors = [color1, color2, color3];
var freq = 4; // color changes per second
var idx = Math.floor(time*freq)%colors.length;
colors[idx]

[Dan Ebberts]

Might be helpful:

https://www.motionscript.com/articles/speed-control.html

motionscript.com

Expression Speed and Frequency Control

Dan Ebberts's resource for After Effects scripting and expressions

[Dan Ebberts]

Sorry, I just don’t understand enough about what you’re trying to do or how it’s supposed to work to offer a suggestion. Maybe someone else will chime in…

[Dan Ebberts]

Sorry for being so dense. How many layers are there?

[Dan Ebberts]

So what’s supposed to happen as you increase the slider?

[Dan Ebberts]

My guess would be that one of your selected layers doesn’t have the same Animator setup as the others, so that the property spec selectedLayers[i].property(“Text”).property(“Animators”)…. doesn’t actually exist.

[Dan Ebberts]

Try it this way:

var thisComp = app.project.activeItem;
var selectedLayers = thisComp.selectedLayers;
for (var i = 0; i < selectedLayers.length; i++){
  textAnchorPointGrouping = selectedLayers[i].property("Text").property("Animators").property("Animator 1").property("Selectors").property("Range Selector 1").property("Advanced").property("Based On");
  textAnchorPointGrouping.setValue(1);
}

[Dan Ebberts]

Try changing the 3rd line to this:

textAnchorPointGrouping = curLayer.property("Text").property("Animators").property("Animator 1").property("Selectors").property("Range Selector 1").property("Advanced").property("Based On"); 

[Dan Ebberts]

I’m not 100% sure, but this might be close to what you’re looking for:

x = thisComp.layer("Data_02").effect("Point Control")("Point");
y = thisComp.layer("Data_01").effect("Point Control")("Point");
t = 0;
for (f = 0; f <= timeToFrames(time); f++){
  tf = framesToTime(f);
  if (x.valueAtTime(tf)[0] < y.valueAtTime(tf)[0]){
    t = time - tf;
    break;
  }
}
linear(t,0,5,value,thisComp.layer("Line_01").transform.yPosition);

[Dan Ebberts]

Not directly. Expressions have no memory, so when an expression wakes up, it has no way of knowing if it’s in the middle of an animation that was triggered in the past. It has to either (depending on what kind of triggering you want) go backwards from the current frame, or forwards from time=0, frame-by-frame (using valueAtTime) to figure out if a triggering event has occurred, and if so, how long ago did it happen. It’s a little tricky, but not too tough to set up. You have to decide whether it’s looking for a single trigger event, or if it can be re-triggered. So, more details about how it should actually work would be helpful.