DNA print JS

function printDNA(lengthOfTheDNA) {

    let array = ["A", "T", "C", "G", "T", "T", "A", "G", "G", "G"];
    let index = -1;

    while (lengthOfTheDNA > 0) {
    let firstRow = `**${array[++index]}${array[++index]}**`;
    console.log(firstRow);
    lengthOfTheDNA--;

    if (lengthOfTheDNA === 0) {
      break;
    }

    if (index + 1 === Number(array.length)) {
      index = -1;
    }

    let secondRow = `*${array[++index]}--${array[++index]}*`;
    console.log(secondRow);
    lengthOfTheDNA--;

    if (lengthOfTheDNA === 0) {
      break;
    }

    if (index + 1 === Number(array.length)) {
      index = -1;
    }

    let thirdRow = `${array[++index]}----${array[++index]}`;
    console.log(thirdRow);
    lengthOfTheDNA--;

    if (lengthOfTheDNA === 0) {
      break;
    }

    if (index + 1 === Number(array.length)) {
      index = -1;
    }

    let forthRow = `*${array[++index]}--${array[++index]}*`;
    console.log(forthRow);
    lengthOfTheDNA--;

    if (lengthOfTheDNA === 0) {
      break;
    }

    if (index + 1 === Number(array.length)) {
      index = -1;
    }
  }

}