gistfile1.js

/* global */
var foo = 0;

function () {
  switch(foo) {
    case 0:
      // some code
      foo = 1;
      return;
    case 1:
      // some more code
      foo = 2;
      return;
    case 2:
      // last bit of code
      foo = 0;
      return;
  }
}