body
{
    text-align: center;
}
table
{
    margin: auto;
    border-collapse: collapse;
}
tr
{
    border: 1px black solid;
}
td
{
    border: 1px black solid;

}
.gris
{
    background-color: gray;
}
.orange
{
    background-color: orange;
}
.red
{
    background-color: red;
}