How do you use a counter and if else statement to create a 1 row 6 col table?

I am new to Javascript. I am using a counter to determine the structure of a table.

I have tried to create a logic function that when the counter is 0, create a row. If the counter is between 1-6 create a table header within the row. If the counter is greater than 6 reset the counter to 0.

Thanks

<script>
    var counter = 0;

    function addRow(v_id, t_id) {

    "use strict";
    var tableBody = document.getElementById(t_id);
    var td1 = document.createElement("td"); 
    var row = document.createElement("tr");
    var col = document.createElement("cols");

    td1.innerHTML = document.getElementById(v_id).innerHTML;

    row.appendChild(td1);

    tableBody.appendChild(row);
    }

</script>
<script>
    function t1 (var counter) {
    //Add row
        if (counter === 0) 
            {document.createElement("tr")}

    //Add th
        else if (counter === 1-6) 
            {document.createElement("th")}

    //Counter reset
        else if (counter >6)
            {counter = 0}
        }   
</script>