Whatsapp and Phone button at the bottom of the page when mobile

On the mobile version of your responsive template we show a Whatsapp and a phone button.

If the mobile phone user presses the blue button, the phone app opens directly, if he presses the green button, Whatsapp opens directly on the mobile phone and connects him with the seller.

Of course including colour changes / size changes (e.g. if you already have a banner in the footer).