--2028 08 31 voxel
--toggle visibility of all reference layers

local sprite = app.activeSprite
--if there's no active sprite then just fail silently
if not sprite then
  return
end

--for every layer
for _, layer in ipairs( sprite.layers ) do
  --test if reference layer
  if layer.isReference then
    --toggle visibility
    layer.isVisible = not layer.isVisible
  end
end

--tell aseprite that something changed
app.refresh()