Как я могу сгенерировать случайный выбор на основе выбора пользователем опции <select>?

function xyz() {
  var x = document.getElementById("selectedId").value;
  if (x == "action") {
    var action = ["Attack on Titan", "Fullmetal Alchimist", "One Punch Man", "Sword Art Online", "My Hero Academia", "Demond Slayer", "Naruto", "Tokyo Ghoul", "Hunter x Hunter", "Code Geass", "Jujutsu Kaisen", "One Piece", "Noragami", "Akame ga Kill!", "Mob Psycho 100", "Assassination Classroom", "Blue Exorcist", "Bleach", "Parastyle", "Cowboy Bebop", "Fairy Tail", "Soul Eater", "Jojo's Bizarre Adventure", "Black Clover", "Fullmetal Alchemist", "That Time I got Reincarnated as a Slime", "Fire Force", "Balck butler", "Spy x Family", "The Seven Deadly Sins", "Tokyo Revengers", "Devilman: Crybaby", "Chainsaw Man"]
    var result = Math.floor(Math.random() * action.length);
    console.info(action);
  } else if (x == "comedy ") {
    var comedy = ["One Punch Man", "No Game NO Life", "Mob Psycho 100", "Assassination Classroom", "KonoSuba: God's Blessing on This Wonderful World!", "Kill la Kill", "Rascal Does Not Dream of Bunny Girl Senpai", "Dr.Stone", "Kaguya-sama: Love is War", "Soul Eater", "Gurren Lagann", "The Devil is a Part-Timer", "Black Clover", "High School DxD", "That Time I Got Reincarnated as a Slime", "Maid Sama!", "Spy x Family", "Black Butler", "Nisekoi", "Ouran High School Host Club", "My Little Monster", "JoJo's Bizarre Adventure:", "K-On!", "The Disastrous Life of Saiki K.", "My Teen Romantic Comedy SNAFU TOO!", "Golden Time", "Monthly Girls' Nozaki-kun", "Rent-a-Girlfriend", "The Quintessential Quintuplets", "Don't Toy with Me, Miss Nagatoro", "How Not to Summon a Demon Lord", "Ghost Stories"]
    var result = Math.floor(Math.random() * comedy.length);
    console.info(comedy);
  } else if (x == "drama") {
    var drama = ["Attack on Titan", "Fullmetal Alchemist", "Your Name.", "Steins:Gate", "A Silent Voice", "Code Geass", "Toradora!", "Your Lie in Apirl", "Re:Zero", "Angel Beats!", "Death Parade", "Violet Evergarden", "Rascal Does Not Dream of Bunny Girl Senpai", "Anohana: The Flower We Saw That Day", "Clannad", "Charlotte", "Kakegurui", "Made in Abyss", "The Pet Girl of Sakurasou", "Guilty Crown", "Jojo's Bizarren Adventure", "Classroom of the Elite", "Tokyo Revengers", "ReLIFE", "Monster", "5 Centimeters Per Second", "Plasic Memories", "Tower of God", "The Garden of Words", "Banana Fish", "Orange", "To Your Eternity", "Fruits Basket", "91 Days"]
    var result = Math.floor(Math.random() * drama.length);
    console.info(drama);
  } else if (x == "sliceofLife") {
    var sliceofLife = ["Violet Evergarden", "Anohana: The Flower We Saw That Day", "Hyouka", "Miss Kobayashi's Dragon Maid", "ReLIFE", "5 Centimeters Per Second", "The Melancholy of Haruhi Suzumiya", "Blue Spring Ride", "Kimi ni Todoke: From Me to You", "I Want To Eat Your Pancreas", "My Dress-Up Darling", "The Garden of Words", "Beastars", "Mushu-Shi", "Wolf Children", "Nana", "Barakamon", "Natsume's Book of Friends", "Bunny Drop", "Laid-Back Camp", "Love-Live!", "Tanaka-Kun is Always Listless", "Kimi ni Todoke", "School-Live!", "Tamako Market", "Beck", "Place to Place", "One Week Friends", "Girls' Last Tour", "Remake Our Life!", "Silver Spoon", "Flying Witch", "Doukyusei-Classmates", "Colorful"]
    var result = Math.floor(Math.random() * sliceofLife.length);
    console.info(sliceofLife);
  } else if (x == "fantasy") {
    var fantasy = ["Sword Art Online", "Demon Slayer", "Naruto", "Tokyo Ghoul", "Hunter x Hunter", "No Game No Life", "Jujutsu Kaisen", "One Piece", "Noragami", "Re:Zero", "Akame ga Kill!", "The Seven Deadly Sins", "Bleach", "Blue Exorcist", "Fairy Tale", "Violet Evergrden", "Soul Eater", "The Devil is a Part-Timer!", "Black Clover", "Overlord", "The Rising of the Shield Hero", "Is it Wrong to Try to Pick Up Girls in a Dungeon", "fate/Zero", "Noragami Aragoto", "Demond Slayer", "That Time I Got Reincarnated as a Slime", "log Horizon", "Re:Zero", "Goblin Slayer", "Tenki no Ko", "Tower of God", "The God of High School", "GATE", "Fruits Basket", "The Asterisk War"]
    var result = Math.floor(Math.random() * fantasy.length);
    console.info(fantasy);
  } else if (x == "horror") {
    var horror = ["Tokyo Ghoul", "Parasyte", "Another", "Elfen Lied", "Highschool of the Dead", "Deadman Wonderland", "Devilman: Crybaby", "Hellsling Ultimate", "Akira", "When They Cry", "Kabaneri of the Iron Fortress", "From the New World", "Beserk", "Shiki", "Ajin", "Psprika", "Dorohedoro", "Mieruko-chan", "Blood+", "Corpse Party: Tortured Souls", "Hell Girl", "Gantz", "Danganronpa", "Mononoke", "High-Rise Invasion", "Happy Sugar Life", "Ghost Hunt", "The Los Village", "Pupa", "Ghost Stories", "Lunar Ledgen Tsukihime", "Junji Ito Collection", "Zetman", "Memories"]
    var result = Math.floor(Math.random() * horror.length);
    console.info(horror);
  } else if (x == "mystery") {
    var mystery = ["Earsed", "The Promised Neverland", "Another", "Kakegutui", "Durarara", "Hyouka", "Made in Abyss", "Bungo Stray Dog", "Black Butler", "Monster", "Darker then Black", "Black Bullet", "Tower of God", "When They Cry", "K", "From the New World", "Serial Experiments Lain", "Great Pretender", "Vanpire Knight", "Eden of The East", "No.6", "Summer Time Rendering", "Wolf's Rain", "Amnesia", "High-Rise Invation", "Astra Lost in Space"]
    var result = Math.floor(Math.random() * mystery.length);
    console.info(mystery);
  } else if (x == "psychological") {
    var psychological = ["Deaht Note", "Tokyo Ghoul", "Re:Zero", "Erased", "The Future Diary", "The Promised Neverland", "Psycho-Pass", "Terror in Resonance", "Classroom of the Elite", "Btooom!", "FLCL", "Perfect Blue", "Ergo Proxy", "The Fruit of Grisaia", "Shiki", "Blast of Tempest", "Paranoia Agent", "Cyberpunk: Edgerunners", "Moriarty the Patriot", "Platinum Emd", "B: The Beginning", "Invaded", "When Marnie Was There", "Tomodachi Game", "Haibane Renmei", "Death Billards", "Flowers of Evil"];
    var result = Math.floor(Math.random() * psychological.length);
    console.info(psychological);
  } else {
    var boysLove = ["Given", "No.6", "Love Stage!", "Beyond the Boundary: I'll Be Here - Future", "Junjou Romantica", "Doukyusei -Classmates-", "Hitorijimd My Hero", "Sasaki and Miyano", "Dakaretai Otoko 1-i ni Odosarete Imasu.", "Super Lovers", "Yarchin Bitch-bu", "Gakuen Heaven", "kirepapa", "Yes, No, or Maybe?", "Ten Count", "Fake"]
    var result = Math.floor(Math.random() * boysLove.length);
    console.info(boysLove);
  }
}

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<head>
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  <meta name = "viewport" content = "width=device-width, initial-scale=1.0>" <title> Final Project
  </title>
  <link rel = "stylesheet" type = "text/css" href = "FPCSS.css" />
</head>

<body class = "style">

  <div id = "Top">
    <p class = "title"> Anime for All
      <IMG class = "IMG1" SRC = "five.gif"> </p>
    <p>
      <br>
    </p>

    <div class = "Directory">
      <!-- Website navigation-->
      <h1>Directory</h1>
      <p><a href = "FP1.html"> Homepage</a></p>
      <p><a href = "FP2.html"> Anime History</a></p>
      <p><a href = "FP3.html"> Misconceptions and Genres</a></p>
      <p><a href = "FP4.html"> Recommendations</a></p>
      <p><a href = "FP5.html"> Random Anime Generator</a></p>
      <p><a href = "mailto:[email protected]">Email me!</a></p>
    </div>

    <div class = "MS">
      <!--MS= format for main section-->
      <h1>Random Anime Generator</h1>
      <label> Select your Favorite genres to generate a anime!</label>
      <select id = "selectedId">
        <option>Choose a Genre</option>
        <option value = "action"> Action</option>
        <option value = "adventure">Adventure</option>
        <option value = "comedy">Comedy</option>
        <option value = "drama">Drama</option>
        <option value = "sliceOfLife">Slice Of Life</option>
        <option value = "fantsy">Fantsy</option>
        <option value = "horror">Horror</option>
        <option value = "mystery">Mystery</option>
        <option value = "psychological">Psychological</option>
      </select>
      <p> Your random anime based on chosen genre is....</p>
      <p id = "result"> </p>
      <script src = "Final_Project_JS.js"></script>
    </div>
  </div>