demo.js

angular.module('ui.bootstrap.demo').controller('ProgressDemoCtrl', function ($scope) {
  $scope.max = 200;

  $scope.random = function() {
    var value = Math.floor(Math.random() * 100 + 1);
    var type;

    if (value < 25) {
      type = 'success';
    } else if (value < 50) {
      type = 'info';
    } else if (value < 75) {
      type = 'warning';
    } else {
      type = 'danger';
    }

    $scope.showWarning = type === 'danger' || type === 'warning';

    $scope.dynamic = value;
    $scope.type = type;
  };

  $scope.random();

  $scope.randomStacked = function() {
    $scope.stacked = [];
    var types = ['success', 'info', 'warning', 'danger'];

    for (var i = 0, n = Math.floor(Math.random() * 4 + 1); i < n; i++) {
        var index = Math.floor(Math.random() * 4);
        $scope.stacked.push({
          value: Math.floor(Math.random() * 30 + 1),
          type: types[index]
        });
    }
  };

  $scope.randomStacked();
});