var freq = 0.3;
var amp = 90;
var loopSec = 6;
var t = ((time - inPoint) % loopSec + loopSec) % loopSec;
var a = wiggle(freq, amp, 1, 0.5, t);
var b = wiggle(freq, amp, 1, 0.5, t - loopSec);
ease(t, 0, loopSec, a, b);
