<style>
.tbl1{
    border:1px solid black;
    border-collapse:separate;
    border-spacing: 5px;
}

.tbl1 td{
    border:1px solid black;
    padding:5px; 
}

.tbl1 tr:first-child td{
    border-top-width:2px;
}

.tbl1 tr:first-child td{
    border-top-width:3px;
}

.tbl1 tr:nth-child(2) td{
    border-left:3px solid red;
}

.tbl1 tr:nth-child(5) td{
    border-right:3px dotted black;
}


.tbl1 td:last-child{
    border-bottom:3px solid blue;
}

.tbl1 tr:nth-child(4) td:nth-child(3){
    border:5px solid orange;
}

.tbl1 tr:nth-child(3) td:nth-child(2){
    border:5px solid orange;
}

.tbl1 tr:nth-child(3) td:nth-child(4){
    border:5px solid orange;
}

</style>


<table class='tbl1'>
<tr>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
</tr>
<tr>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
</tr>
<tr>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
</tr>
<tr>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
</tr>
<tr>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
</tr>
<tr>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
    <td>--------</td>
</tr>

</table>