+−<!DOCTYPE html> +−<html> +−<style> +−@keyframes anim { +− from { background-color: rgba(0, 0, 0, 0); } +− to { background-color: rgba(255, 0, 0, 255); } +−} +−body { +− animation: anim 100s; +− width: 100vw; +− height: 100vh; +−} +−</style>
