text: function helix(number) {
      let rows = Number(number);
      let sequence = "ATCGTTAGGG";
      let currentIndex = 0;
  
      for (let i = 0; i < rows; i++) {
          let currentRow = i % 4;
          if (currentIndex === sequence.length) {
              currentIndex = 0;
          }
  
          if (currentRow === 0) {
              console.log("**" + sequence[currentIndex++] + sequence[currentIndex++] + "**");
          } else if (currentRow === 1 || currentRow === 3) {
              console.log("*" + sequence[currentIndex++] + "--" + sequence[currentIndex++] + "*");
          } else if (currentRow === 2) {
              console.log(sequence[currentIndex++] + "----" + sequence[currentIndex++]);
          }
      }
  }
  