*{
    font-family: Arial;
}

h2{
    text-align: center;
}

#paragraph::first-letter {
    color: lightgreen;
    font-size: 50px;
    text-shadow: 1px 1px 3px grey;
}

#paragraph::first-line{
    color: blue;
}

::selection{
    background-color: red;
    color: red;
}

.plus::after{
    content: " +";
}
.plus::before{
    content: " - ";
}

::