:root {
animation: warning 2s infinite
}

@keyframes warning {
0% { background-color: rgb(0, 0, 0); }
50% { background-color: rgb(105, 0, 0); }
100% { background-color: rgb(0, 0, 0); }
}

.boxbg {
margin-left: auto;
margin-right: auto;
margin-top: 250px;
}

.boxheader {
margin-left: auto;
margin-right: auto;
margin-top: -400px;
}

.warning {
display: flex;
justify-content: center;
margin-top: -90px;
font-size: 75px;
font-family: Arial, Helvetica, sans-serif;
}

.poo {
display: flex;
justify-content: center;
margin-top: 65px;
font-size: 40px;
font-family: 'Comic Sans MS', 'Chalkboard SE', 'Comic Neue', sans-serif;
}

.true {
display: flex;
justify-content: center;
margin-top: 65px;
}