Renamed JS folder and started learning Crystal

JavaScript/SimpleWebServer/public/JS/Timer/sketch.js

@@ -0,0 +1,41 @@
+var timeleft = 10;
+var startTime = 0;
+var currentTime = 0;
+
+function convertSeconds(s) {
+  var min = floor(s / 60);
+  var sec = s % 60;
+  return nf(min, 2) + ':' + nf(sec, 2);
+}
+
+var ding;
+
+function preload() {
+  ding = loadSound("ding.mp3");
+}
+
+function setup() {
+  noCanvas();
+  startTime = millis();
+
+  var params = getURLParams();
+  console.log(params);
+  if (params.min) {
+    var min = params.min;
+    timeleft = min * 60;
+  }
+
+  var timer = select('#timer');
+  timer.html(convertSeconds(timeleft - currentTime));
+
+  var interval = setInterval(timeIt, 1000);
+
+  function timeIt() {
+    currentTime = floor((millis() - startTime) / 1000);
+    timer.html(convertSeconds(timeleft - currentTime));
+    if (currentTime == timeleft) {
+      ding.play();
+      clearInterval(interval);
+    }
+  }
+}