h1 {    
    font-size: 10pt;
    color: yellow;  
    text-align: center;
    background-color: purple;

    animation-duration: 3s;
    animation-name: slidein;

}

div {
    background-color: yellow;
    animation-duration: 3s;
    animation-name: slidein;

}

#teste1 {
    background-color: green;
}

.nada {
    background-color: red;
}

@keyframes slidein {
    from {
        margin-left: 100%;
        width: 300%
    }

    to {
        margin-left: 0%;
        width: 100%;
    }
}

#ga {
    color : blue;
    background-color: orange;
}