A button containing a yellow button with radial-gradient(circle, pink, purple) background that says 'Hello World', followed by a medium text description, with bounce.
<p><button style='background-color: linear-gradient(to bottom, blue, green); font-size: 30px; animation: fade-in 2s;'>Hello World</button><p style='font-size: 30px;'>hello world</p></p> @keyframes fade-in { from { opacity: 0; } to { opacity: 1; } } transition: background-color 0.4s ease;