Creates a strobe light effect by toggling between values.
if (Math.floor(time % 2) == 1){100}else{0}
Changing the opacity of a layer if it crosses a certaing position.
Making a text layer's opacity blink between 100% and 0% every second.
Ensuring that a layer's scale never goes below 50% or above 150%, no matter what animations or adjustments you apply.