.body 

.banner {
    background-image: url(twermos.png);
    background-repeat: no-repeat;
    justify-content: center;
    background-size: 50%;
        text-shadow: lightskyblue;
        color: rgb(0, 195, 255);
        box-shadow: 0 0 20px;
}

.banner:active {
    cursor: crosshair;
}

.banner {
    cursor: help;
}

.banner {
    animation: pulsarcombrilho 9.5s infinite ease;
  }
  
@keyframes pulsarcombrilho {
    0% {
        transform: scale(50%);
        opacity: 1; 
    }
    50% {
        transform: scale(40%);
        opacity: 1;
    }
    100% {
        transform: scale(50%);
        opacity: 1;
    }
}