How to add animation, keyframes in the basetheme?

Everything is in the title :slight_smile:
But to be more precise, I want to use css animation to make some lines blinking when I eval a block of code.
For the moment it’s really simple :

const blinkTheme= EditorView.baseTheme({
  ".cm-blink": {  animationName: 'blink',
                        animationDuration: '1s',
                       // I suppose that it cannot be here ?
// should it be here then? If yes how to write it?

Thank you very much for helping

I got it :

    '@keyframes blink' : {
      from: {backgroundColor: 'aliceblue'},
      to: {backgroundColor: 'black'}