Typescale Number Sequence

typescale-number-sequence.js

function generateForwardNumberSequence(base, scale) {
  var i = 0,
  lastNumber = base * scale,
  numbers = [];
  while(i < 10) {
    lastNumber = Math.round(lastNumber*1000)/1000;
    
    numbers[i] = lastNumber;
    lastNumber = lastNumber * scale;
    i++;
  }
  for (var num in numbers) {
    document.getElementById("body").innerHTML += numbers[num]+"<br>";
  }
}


function generateReverseNumberSequence(base, scale) {
  var i = 0,
  lastNumber = base,
  numbers = [];
  while(i < 5) {
    lastNumber = Math.round(lastNumber*1000)/1000;
    numbers[i] = lastNumber;
    lastNumber = lastNumber / scale;
    i++;
  }
  numbers.reverse();
  for (var num in numbers) {
    document.getElementById("body").innerHTML += numbers[num]+"<br>";
  }
}

function generateNumberSequence (base, scale) {
  generateReverseNumberSequence(base, scale);
  generateForwardNumberSequence(base, scale);
}

var base = 1;
var scale = 1.250; // Major third

generateNumberSequence (base, scale);