Edit the duration of text expression after effects

Question

hi I want to decrees the duration of my text animation with this expression I’ve tried edit the '' framDuration*2 '' I’ve set it to ‘’ framDuration*1 ‘’ it worked but it only decreased from 2s to 1s I want it to decrees bellow 1 second something like 15 frame or 10 frames

freq = 1;
decay = 6;
duration = 0.25;
retard = (textTotal-textIndex)*thisComp.frameDuration*2;
t = time - (inPoint + retard);
startVal = [100,100,100];endVal = [0,0,0];
if (t < duration){
linear(t,0,duration,startVal,endVal);
}else{
amp = (endVal - startVal)/duration;
w = freq*Math.PI*2;
endVal + amp*(Math.sin((t-duration)*w)/Math.exp(decay*(t-duration))/w);}

Rick Gerard · Answer

Changeduration = 0.25;toduration = 15 * thisComp.frameDuration; That will make duration count frames instead of seconds.  What property are you adding this expression to? I'm not exactly sure what you are trying to accomplish because the expression basically moves a 3D position property from 100, 100, 100 to 0, 0, 0, and adds a bounce but it throws an error if added to Transform/Position which is the only 3 Axis array possible on a text layer without an effect applied.

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