body {
     background-color: black;
color: white;
animation: svetloba 5s inifnite;
}

h1 {
color: red;
}

a {
color: white;
}

@keyframes svetloba{
0% {
filter: brightness(1);
}
95% {
filter: brightness(0.2);
}
100% {
filter: brightness(1);
}
}


h2 {
font-size: 38px;
color: red;
}