.btn_notvisible {
    font-weight: bold;
    display:inline-block;
    font-family: monospace;
    font-size: 30px;
    -webkit-clip-path: inset(0 3ch 0 0);
            clip-path: inset(0 3ch 0 0);
    -webkit-animation: l 1s steps(4) infinite;
            animation: l 1s steps(4) infinite;
    font-family: 'Bodoni';
    letter-spacing: 7px;
    line-height: 30px;
}
  
@-webkit-keyframes l {
    to {
        -webkit-clip-path: inset(0 -1ch 0 0);
                clip-path: inset(0 -1ch 0 0)
    }
}
  
@keyframes l {
    to {
        -webkit-clip-path: inset(0 -1ch 0 0);
                clip-path: inset(0 -1ch 0 0)
    }
}