.anim3-particle {
    $side: 20px;

    background: url('../res/seahorse.svg') no-repeat center top #aaa;
    background-size: 20px 20px;
    border-color: purple;
    color: #fff;
    // border-style: dashed;
    border-radius: $side / 2;
    // border-width: 1px;
    height: $side;
    line-height: $side;
    position: absolute;
    text-align: center;
    width: $side;

    &.scared {
        background: #f00;
    }
}