Flicker in to 100% Opacity Expression

//FLICKER IN TO 100% OPACITY:	
//Adjust this flicker frequency to your taste
flickerFrequency = 150;

op = value;
if(op > 0 && op < 100){
    reverseAmt=100-transform.opacity;
    wiggledAmt=wiggle(flickerFrequency,reverseAmt);
    roundedAmt=Math.round((wiggledAmt/100));
    roundedAmt*100;
}