.piechart {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border-color: #ccc;
    border-width: 0.5px;
    border-style: solid;
}

.piechart0 {
    background-image: conic-gradient( green 0deg, white 0 );
}

.piechart25 {
    background-image: conic-gradient( green 90deg, white 0 );
}

.piechart50 {
    background-image: conic-gradient( green 180deg, white 0 );
}

.piechart75 {
    background-image: conic-gradient( green 270deg, white 0 );
}

.piechart100 {
    background-image: conic-gradient( green 360deg, white 0 );
}