Resize all layers in script-fu

[BaconWizard17]

I am more familiar with Python coding than I am with Scheme, but I've gotten this far with Scheme so I may as well finish the job. I'm assuming that using gimp-image-get-layers would just be: 

Code:

(let*
    (
        (num-layers (car (gimp-image-get-layers image)))
       (layer-ids (cdr (gimp-image-get-layers image)))
    )
        
)

(I haven't done anything with multiple return values before, but from some quick googling this seems to be the right way to do that)

I haven't been able to find terrific documentation on looping in Scheme. Based on what I've seen, I was able to put this together, but it doesn't resize any layers

Code:

(define layer-resize
    (lambda (a-layer layer-ids)
        (gimp-layer-resize-to-image-size a-layer)
    )
)

Any insight?