useEffect in the functional components

import React, {useState, useEffect} from 'react';

...

function App() {

  const[movies, setMovies] = setState([

    {

      title: "Matrix",

      poster: "https://~"

    },

...

  ]);

  useEffect(() => {

    const timer = setTimeout(() => {

      setMovies([

        {

           title: "Trainspotting",

           poster: "https://~"

        },

        ...movies

      ])

    }, 5000);

    return () => clearTImeout(timer);

  // eslint-disable-next-line ([]로 인해 생기는 오류를 무시한다)

  }, []);