example-1.ts

import { CountdownSegment, CountupSegment, ITimeEmission, Sequencer } from 'sots';

const sequencer: Sequencer = new Sequencer({ period: 1000 });
sequencer.add(CountdownSegment, {
  duration: 3000,
  states: [
    { state: 'Started!', timeAt: '3' },
  ],
})
  .add(CountupSegment, {
    duration: 3000,
    states: [
      { state: 'Halfway', timeAt: '0' },
    ],
  });

sequencer.subscribe((value: ITimeEmission) => {
  let output: string;

  output = 'time: ' + value.time;
  if (value.state) {

    if (value.state.valueOf('Started!')) {
      output += '<play audible for start>';
    } else if (value.state.valueOf('Halfway')) {
      output += '<play audible for halfway point>';
    }
  }
  console.log(output);
}, (error) => {
  console.error(error);
}, () => {
  console.log('<play audible for completed>');
});

sequencer.start();

/*
time: 3<play audible for start>
time: 2
time: 1
time: 0<play audible for halfway point>
time: 1
time: 2
<play audible for completed>
*/