🚀Mini Challenge Nº1: Background With Gradient Effect

Hello, 🖖

I'm doing mini challenges using CSS to study more and improve my performance in Front-End. 💻📚
In this mini challenge I made a background with a gradient effect, using CSS selectors.

⇾ What I've learned:
• Animation;
• Boz-sizing: border-box;
• @Keyframes.