Multiple If Statements for stock remaining

[Boony972]

Hello, I have added this liquid script on product page for showing how many pieces are left, however, I would like it to say something along the lines of "SOLD OUT" once the stock level = Zero. I have tried with my limited knowledge to get it to work, but no sucess.

Any ideas?

Thanks

{% if product.variants.first.inventory_quantity < 20 %}
<p>Only {{ product.variants.first.inventory_quantity }} Left in Stock! Add to Cart now, These might not be back!!
</p>
{% endif %}