You can use "Lead type" Lead bar to gather newsletter subscribers or to collect leads.
First select "Lead type" from the Bar type dropdown. Then type your message in the text box. You can choose whether to scroll your text from "Scrolling text" option. Give a text to your button and then paste the URL where you want your customers to redirect to in the "Link URL" option.
You can go to "Design" and "Settings" to make changes to your Lead bar (Same as Link type)
Click on "Lead form" to customize your lead bar.
Give field names and field types accordingly. Also give a Thank you text in the bottom field. Once done, don't forget to save your settings by clicking "Save" button on top right hand side of the page.
And this is how it looks. Now you can make yours too!