Adding a Petition to Squarespace Website

Hey Everyone!

Is there a 3rd party service (or a way) to integrate a petition sign-up form on a Squarespace site?

The basic functionality that I want it to possess is:

• Form fields that allow me to collect name, location, zip-code, display the order of their sign-up (e.g., submission 1, 2, 3, etc.)
• Submit button
• Maybe the data is also captured and easily recorded in a backend spreadsheet (e.g., Google Spreadsheet)
• The data is displayed on the Squarespace page one the form is submit and the page is refreshed

Any thoughts on how to make this happen? Either through a custom integration or an iFrame'd code injection?

Thank you! 🙂