Loop a Wiggle

frequency = 2; // wiggles per second
amplitude = 40; // amount of pixels to wiggle
secondsToLoop = 3; // time to loop in seconds
// --------
t = time % secondsToLoop;
wiggle1 = wiggle(frequency, amplitude, 1, 0.5, t);
wiggle2 = wiggle(frequency, amplitude, 1, 0.5, t - secondsToLoop);
linear(t, 0, secondsToLoop, wiggle1, wiggle2)

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frequency = 2; // wiggles per second
amplitude = 40; // amount of pixels to wiggle
secondsToLoop = 3; // time to loop in seconds
// --------
t = time % secondsToLoop;
wiggle1 = wiggle(frequency, amplitude, 1, 0.5, t);
wiggle2 = wiggle(frequency, amplitude, 1, 0.5, t - secondsToLoop);
linear(t, 0, secondsToLoop, wiggle1, wiggle2)

How to Loop a Wiggle in After Effects

The Wiggle Expression is one of the most common and useful expressions for adding randomness and variation to properties in After Effects. However, it doesn't loop easily by default.

This expression allows you to create a looping wiggle by cleverly animating between 2 different wiggle expressions.

How to Use

Apply this expression to any property to get a random wiggle value that loops every n seconds.

frequency = the amount of wiggles per second

amplitude = the amount (pixels, percent) you want the wiggle to vary

secondsToLoop = how many seconds you want the loop to last

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Credit

Original expression by Dan Ebberts

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Loop a Wiggle - After Effects Expression