body {
    background-image: url("1x/Recurso_9.png");
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    text-align: center;
    background-attachment: fixed;
}

.projects {
    size: 200px;
}

.programming img,
    .photograph img,
        .events img {
            background-image: url("3x/background_2.png");
            border-radius: 6% 6% 20% 20%; 
            margin: 10px;
}