@keyframes uppies {
    0%{top:0px;}
    50%{top:2px;}
    100%{top:0px;}
}

.upndown1 {
    position: relative;
    animation: uppies 1s linear 0s infinite;
}
.upndown2 {
    position: relative;
    animation: uppies 1s linear -0.2s infinite;
}
.upndown3 {
    position: relative;
    animation: uppies 1s linear -0.4s infinite;
}
.upndown4 {
    position: relative;
    animation: uppies 1s linear -0.6s infinite;
}
.upndown5 {
    position: relative;
    animation: uppies 1s linear -0.8s infinite;
}

.SPOILER {
    background-color: gray;
    color: gray;
    user-select: none;
}
.SPOILER:hover {
    color: white;
}