new level sewers

js/index.js

@@ -13,6 +13,23 @@ const cat = {
   phased: 0x100000000,
 }
 
+function shuffle(array) {
+  var currentIndex = array.length,
+    temporaryValue,
+    randomIndex;
+  // While there remain elements to shuffle...
+  while (0 !== currentIndex) {
+    // Pick a remaining element...
+    randomIndex = Math.floor(Math.random() * currentIndex);
+    currentIndex -= 1;
+    // And swap it with the current element.
+    temporaryValue = array[currentIndex];
+    array[currentIndex] = array[randomIndex];
+    array[randomIndex] = temporaryValue;
+  }
+  return array;
+}
+
 //example  https://landgreen.github.io/sidescroller/index.html?
 //          &gun1=minigun&gun2=laser
 //          &mod1=laser-bot&mod2=mass%20driver&mod3=overcharge&mod4=laser-bot&mod5=laser-bot&field=phase%20decoherence%20field&difficulty=2