html, body{
    padding: 0%;
    margin: 0%;
}

.container{
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.square{
    height: 1.5em;
    width: 1.5em;
    margin: 1.5em;
    animation: rotate infinite 1.5s;
}

.square1{
    background: red;
}

.square2{
    background: orange;
}

.square3{
    background: blue;
}

@keyframes rotate{
    from{
        transform: rotate(-45deg);
    }
    to{ 
        transform: rotate(45deg);
    }
}