body {
    margin: 0;
    background-color: #000000;
    font: normal 1em / 1.5em BlinkMacSystemFont, -apple-system, 'Segoe UI', roboto, helvetica, arial, sans-serif;
 }
div {
    display: flex;
    height: 100vh;
    justify-content: center;
    align-items: center;
 }
.tri {
    stroke: #000;
    stroke-dasharray: 240;
    stroke-dashoffset: 480;
    transform: translateY( 0 );
    transition: all 0.7s ease-in-out;
 }