body {
    background-color: aliceblue;
    display: flex;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
    height: 100vh;
}

div {
    width: 50%;
    height: 50%;
    box-sizing: border-box;
}

.divuno {
    border: 4px solid #3fff18;
    background-color: #3d3c3c;
}

.divdos {
    border: 4px dotted #ffffff;
    background-color: #1342db;
}

.divtres {
    border: 4px dashed #f022d4;
    background-color: #310628;    
}

.divcuatro {
    border: 4px ridge #ffb71b;
    background-color: #363210;
}