Repeater Count

Hi

I am trying to run an if statement to check that 5 items are present within a repeating region to allow it to be shown on screen else show a single image.

What is the best way to check the number of items in a repeater. My sample code is below.

<perch:if id="backgroundImages" match="eq" value="5">
<perch:repeater id="backgroundImages" label="Multi Background Images" max="5" order="2" divider-before="Must be 5 images to show as rotator">
<perch:before><div class="background"></perch:before>
    <figure style="background-image:url(<perch:content type="image" id="heroImage" label="Image" bucket="hero" width="2000" height="500" crop="true" help="Images must be at least 2000px x 400px" />);"></figure>
<perch:after></div></perch:after>
</perch:repeater>
<perch:else/>
<perch:if exists="singleImage">
<div class="backgroundSingle">
    <figure style="background-image:url(<perch:content type="image" id="singleImage" label="Single Image" bucket="hero" width="2000" height="500" crop="true" help="Images must be at least 2000px x 400px" order="1" />);"></figure>
</div>
<perch:else />
<div class="backgroundSingle">
    <figure style="background-image:url(/img/header-no-image.jpg);"></figure>
</div>
</perch:if>
</perch:if>