Untitled

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>My TodoList</title>
</head>
<body>
  <h1>My Todo List</h1>
  <p>Welcome to my todo list</p>

  <div>
    <button onclick="addTodo()">Add</button>
    <input id="addTodoText" type="text" />
  </div>

  <div>
    <button onclick="deleteTodo()">Delete</button>
    <input id="deleteTodoNumber" type="number" />
  </div>

  <div>
    <button onclick="changeTodo()">Change</button>
    <input id="changeTodoNumber" type="number" />
    <input id="changeTodoText" type="text" />
  </div>

  <hr>

  <button onclick="displayTodos()">Show Todos</button>

  <ul>
  </ul>

</body>
</html>