let bgs = [
  "369ac084d3ace24c4d606058cf82885a.jpg",
  "al.jpg",
  "alkuro.jpg",
  "aya.jpg",
  "ayana.jpg",
  "ayana2.jpg",
  "bbb.jpeg",
  "dmd.jpg",
  "dmd2.jpeg",
  "dmtscan.jpg",
  "dmtsk.jpg",
  "hkaguya.jpg",
  "kohakusanisgaming.jpg",
  "meiya.jpg",
  "milfillie.jpg",
  "pcbmenu.jpg",
  "pmiss.jpg",
  "pu.jpg",
  "reimilia.jpg",
  "reimu.jpg",
  "reisen.jpg",
  "ritual.jpg",
  "saya.jpg",
  "saya2.jpg",
  "screenshot-131.png",
  "shiondb.jpg",
  "suba.jpeg",
  "th.jpg",
  "tohear2.jpeg",
  "xpnanami.jpg",
  "yuyuko.jpg",
  "z.jpg"
]

const lyrical =  document.getElementById('lyrical')
const doorpath = 'door'

async function wrapper(){
    changeBgImg(getRandomBg())
    await changeBgAndBlink()
}

  
  const changeBgImg = (bg) => {
    console.log(bg)
    lyrical.style.background = `url(${doorpath}/${bg}) no-repeat center center fixed`
    lyrical.style.backgroundColor = `black`
    lyrical.style.backgroundSize = '100% 100%'
  }
  
  const getRandomBg = () =>{
    const randomIndex = Math.floor(Math.random()*bgs.length)
    return bgs[randomIndex];
  } 
  
  const blink = async (bg, i, duration) => {
      let blinkDuration = duration || randomInt(111, 999)
      if(probability(0.50, i)){
        lyrical.style.background = `black`
        lyrical.style.backgroundSize = '100% 100%'
      }
      else if(probability(0.50, i)){
        blinkDuration = 433
        changeBgImg('../Vpo.gif', '')
      }else if(probability(0.50) || i % 3 === 0){
        blinkDuration = 407
        changeBgImg(getRandomBg())
      }
      else{
        blinkDuration = 213
        changeBgImg('door/ayana.jpg')
      }   
      await sleep(changeBgImg, blinkDuration, [bg])
  }
  
  

function randomInt(min, max) {
return (Math.floor(Math.random() * (max - min + 1) + min))
}

function timeout(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}
async function sleep(fn, time, params = []) {
  await timeout(time);
  return fn(...params);
}

const probability = function(n, i = 1) {
    const random = Math.random()
    return (!!n && random <= n) && i % 3 !== 0;
};


  const changeBgAndBlink = async () => {
    let bg = getRandomBg()
    changeBgImg(bg)
      for(let i = 1; i < randomInt(9, 13); i++){
        const blinkWaitTime = randomInt(444, 1555)
        await sleep(blink, blinkWaitTime, [bg, i])
      }
      changeBgImg('../Vpo.gif', '')
      await sleep(changeBgAndBlink, randomInt(1007, 2777))
  }

    wrapper()