title: How can I work node functions in sequence, when the functions are different node projects?
body: <p>I have 3 node different projects(services). This is structure.</p>
  
  <pre><code>BIG SERVICE
    -service_1
      -start.js
    -service_2
      -start.js
    -service_3
      -start.js
    -big_start.js
  </code></pre>
  
  <p>I want,that when I run big_start.js node file,first work service_1->start.js if everything is OK, second work service_2->start.js,if everything is OK,third work service_3-> start.js.</p>