> ## Documentation Index
> Fetch the complete documentation index at: https://docs.creem.io/llms.txt
> Use this file to discover all available pages before exploring further.

> Fundamental animation skills for Remotion

# Animations

All animations MUST be driven by the `useCurrentFrame()` hook.\
Write animations in seconds and multiply them by the `fps` value from `useVideoConfig()`.

```tsx theme={null}
import { useCurrentFrame } from "remotion";

export const FadeIn = () => {
  const frame = useCurrentFrame();
  const { fps } = useVideoConfig();

  const opacity = interpolate(frame, [0, 2 * fps], [0, 1], {
    extrapolateRight: 'clamp',
  });
 
  return (
    <div style={{ opacity }}>Hello World!</div>
  );
};
```

CSS transitions or animations are FORBIDDEN - they will not render correctly.\
Tailwind animation class names are FORBIDDEN - they will not render correctly.