zundoko.js

(function() {
  "use strict";
  let arr = [];
  for (let i = 0; i < 1e10; ++i) {
    if (Math.random() < 0.5) {
      arr.push(0);
      console.log("ズン");
    } else {
      arr.push(1);
      console.log("ドコ");
      if (
        arr[i - 1] === 0 &&
        arr[i - 2] === 0 &&
        arr[i - 3] === 0 &&
        arr[i - 4] === 0
      ) {
        console.log("きよし！");
        break;
      }
    }
  }
})();