**Challenge**:
Your main goal is to create a 'double border' as seen in the preview, with a blue border on the inside, and a red border on the outside. There should be no space between them. The whitespace inside the box is 30 pixels by 30 pixels.

**Hints:**
 - Look at the HTML for hints as to which properties and selectors to use
 - Use the Box Model properties (margin, padding, etc.) to solve the challenge

**Topics Covered:**
 - Box Model

**Other Information**:
 - Inner border color: #1785eb
 - Outer border color: #f24c46
 - Total (both borders) thickness: 20px