.abcd{
font-size:24px;
font-weight:bold;
color:#391105;
text-shadow: 0 0 10px #ffff00,
                    0 0 20px #ffff00,
                    0 0 30px #ffff00,
                    0 0 40px #fff700,
                    0 0 70px #fff700,
                    0 0 80px #fff700,
                    0 0 100px #fff700,
                    0 0 150px #fff700;
animation: light 1.5s ease infinite alternate;
}
.zwz h3 {
    margin-bottom: 0;
    font-weight: bold;
    font-size: 23px;
    color:#000;
    text-shadow: 0 0 10px #ffff00,
                    0 0 20px #ffff00,
                    0 0 30px #ffff00,
                    0 0 40px #fff700,
                    0 0 70px #fff700,
                    0 0 80px #fff700,
                    0 0 100px #fff700,
                    0 0 150px #fff700;
}
.zwz h3{
   animation: light 1.5s ease infinite alternate;
}