quick woocommerce event code adding

hi

in our wooommerce site using Elessi theme child . we want to

<script>
fbq('track', 'Purchase');
</script>

Paste the Purchase event code
Place the event code on your order confirmation page or purchase completion page.
Add the event code just below the </head> tag. This allows the event code to load along with the pixel code when the page loads.

that is it . this will lead to more projects