:root {
background-color: black;
}

.mario {
    color: white;
    font-size: 35px;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.luigi {
    color: red;
}

.wario {
    color: lime;
}

.waluigi {
    animation: colourchange 0.75s infinite;
}

@keyframes colourchange {
0% {color: rgb(255, 0, 0);}
25% {color: rgb(255, 251, 0);}
50% {color: rgb(0, 255, 76);}
75% {color: rgb(0, 110, 255);}
100% {color: rgb(255, 0, 0);}
}