@keyframes alarm1
{
    0% 
    {
        transform: scale(1);
        opacity: 1;
    }
    50% 
    {
        transform: scale(1.05);
        opacity: 0.8;
        background-color: #ff0000;
    }
    100% 
    {
        transform: scale(1);
        opacity: 1;
    }
}

.alarm1
{
    animation: alarm1 1s infinite;
    -webkit-animation: alarm1 1s infinite;
    background-color: #ff4444;
    color: #ffffff;
    padding: 10px;
    border-radius: 5px;
    display: inline-block;
}