How to add multiplie placeholders to HTML Program? : Okay I made a program

    <div id="todo-app">
        <label class="todo-label" for="new-todo">What do you want to do       today?</label>
        <input type="text" id="new-todo" class="todo-input"
            placeholder="buy milk">

But in the placeholder section I want it to randomly display othe placeholders.

For example, if you reload: new placeholder texts will appear. One time itll say "buy milk" and another "purchase phone"