for(var i = 0; i < 16; i++ ) {
  for(var j = 0; j < 15; j++) {
  //WHAT SHOULD I DO HERE??
  }
}

document.write("<table>");
for (var a=0; a < 10; a++) {
   document.write("<tr>");
   for(var b=0; b<10; b++) {
       document.write("<td>" + value + "</td>");
    }
    document.write("</tr>");
}
document.write("</table>");