[Brook]

Готовое решение с for:

var arr = [],
    step = 5, // offset between choosen positions
    size = 11; // grid size ~ 11x11

for(i = 0; i < size; i++) { // fill array
  arr.push([]);
  var str = '';
  for(j = 0; j < size; j++) {
    arr[i][j] = i * size + j;
    str+=addZero(''+arr[i][j], 3)+', ';
  }
  console.log(str); // draw array
}

for( i = 0 ; i + size * step < arr.length * size; i+=step) { // use ' i+=step' to start from last X pos (ex. 0-1, 1-2), else use ' i+=step+1' to reduce repetition (ex. 0-1, 2-3)
  var row = Math.floor(i / size), 
      column = Math.floor(i % size);
  
      if( row == Math.floor((i + step) / size)  && row % step == 0) { 
    
      console.log(
        '-----'+
        arr[row][column]+","+ 
        arr[row][column + step]+","+
        arr[row + step][column]+","+ 
        arr[row + step][column + step]
      );
      }
  }

function addZero(str,length) { // add 0 to fill str length
  while(str.length < length) {
    str = '0'+str;
  }
  return str;
}