diff --git a/css/main.css b/css/main.css
index 9a75ce0..4f651a1 100644
--- a/css/main.css
+++ b/css/main.css
@@ -821,6 +821,10 @@ select option:disabled {
   opacity: 25%;
 }
 
+#timer:hover:before {
+    content: "⏸"
+}
+
 .sk-cube-grid {
   width: 60px;
   height: 60px;
@@ -909,4 +913,11 @@ display: block
 .answer-sub {
     opacity: 50%;
     text-align: center;
-    }
\ No newline at end of file
+    }
+
+#resume-exam-button {
+  position: fixed;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+}
\ No newline at end of file
diff --git a/index.html b/index.html
index 9bbc24d..06851fd 100644
--- a/index.html
+++ b/index.html
@@ -137,9 +137,13 @@
         </div>
     </div>
 
+    <div id="pause" class="fullscreen-overlay">
+    </div>
+
     <script src="lib/jquery-3.4.1.min.js" type="text/javascript"></script>
     <script src="lib/notify.min.js" type="text/javascript"></script>
     <script src="lib/jq-ajax-progress.min.js" type="text/javascript"></script>
+    <script src="lib/easytimer.min.js" type="module"></script>
     <script src="lib/hammer.js"></script>
     <script src="lib/cornerstone.js"></script>
     <script src="lib/dicomParser.min.js"></script>
diff --git a/js/helpers.js b/js/helpers.js
index a9b6b4c..2830694 100644
--- a/js/helpers.js
+++ b/js/helpers.js
@@ -39,56 +39,4 @@ export function formatBytes(bytes, decimals = 2) {
   const i = Math.floor(Math.log(bytes) / Math.log(k));
 
   return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + " " + sizes[i];
-}
-
-export function CountDownTimer(duration, granularity) {
-  this.duration = duration;
-  this.granularity = granularity || 1000;
-  this.tickFtns = [];
-  this.running = false;
-}
-
-CountDownTimer.prototype.start = function () {
-  if (this.running) {
-    return;
-  }
-  this.running = true;
-  var start = Date.now(),
-    that = this,
-    diff,
-    obj;
-
-  (function timer() {
-    diff = that.duration - (((Date.now() - start) / 1000) | 0);
-
-    if (diff > 0) {
-      setTimeout(timer, that.granularity);
-    } else {
-      diff = 0;
-      that.running = false;
-    }
-
-    obj = CountDownTimer.parse(diff);
-    that.tickFtns.forEach(function (ftn) {
-      ftn.call(this, obj.minutes, obj.seconds);
-    }, that);
-  })();
-};
-
-CountDownTimer.prototype.onTick = function (ftn) {
-  if (typeof ftn === 'function') {
-    this.tickFtns.push(ftn);
-  }
-  return this;
-};
-
-CountDownTimer.prototype.expired = function () {
-  return !this.running;
-};
-
-CountDownTimer.parse = function (seconds) {
-  return {
-    'minutes': (seconds / 60) | 0,
-    seconds: seconds % 60 | 0,
-  };
-};
+}
\ No newline at end of file
diff --git a/js/main.js b/js/main.js
index f2c8ab7..1e0419d 100644
--- a/js/main.js
+++ b/js/main.js
@@ -149,16 +149,15 @@ function setUpQuestions() {
   loadQuestion(0, 1, true);
   createQuestionListPanel();
 
-
   if (window.question_type == "rapid") {
     window.exam_time = 35 * 60;
-  } else if (window.question_type == "anatomy"){
+  } else if (window.question_type == "anatomy") {
     window.exam_time = 90 * 60;
-  } else if (window.question_type == "long"){
+  } else if (window.question_type == "long") {
     window.exam_time = 75 * 60;
   }
 
-  $("#exam-time").text(window.exam_time / 60)
+  $("#exam-time").text(window.exam_time / 60);
 
   $("#start-dialog").modal();
 }
@@ -1683,29 +1682,50 @@ $("#start-exam-button").click(function (evt) {
 });
 
 $("#start-packet-button").click(function (evt) {
-  //window.cid = parseInt($("#candidate-number").val());
-  // const t = 35 * 60;
+  let timer = new easytimer.Timer();
+  //window.exam_time = 2;
+  timer.start({ countdown: true, startValues: { seconds: window.exam_time } });
+  timer.addEventListener("secondsUpdated", function (e) {
+    $('#timer').html("Time left: " + timer.getTimeValues().toString());
+  });
+  timer.addEventListener("targetAchieved", function (e) {
+    $("#time-up-dialog").modal();
+  });
 
-  //const t = 2;
-  let display = document.querySelector("#timer");
-  let timer = new helper.CountDownTimer(window.exam_time);
-  let timeObj = helper.CountDownTimer.parse(window.exam_time);
+  $("#timer").click(() => {
+    timer.pause();
+    $("#pause").empty();
+    $("#pause").append(
+      $(
+        '<button id="resume-exam-button" class="navigation dialog-yes">Resume</button>'
+      ).click(() => {
+        $("#pause").hide();
+        timer.start();
+      })
+    );
+    $("#pause").show();
+  });
 
-  format(timeObj.minutes, timeObj.seconds);
+  // //const t = 2;
+  // let display = document.querySelector("#timer");
+  // let timer = new helper.CountDownTimer(window.exam_time);
+  // let timeObj = helper.CountDownTimer.parse(window.exam_time);
 
-  timer.onTick(format);
+  // format(timeObj.minutes, timeObj.seconds);
 
-  timer.start();
+  // timer.onTick(format);
 
-  function format(minutes, seconds) {
-    minutes = minutes < 10 ? "0" + minutes : minutes;
-    seconds = seconds < 10 ? "0" + seconds : seconds;
-    display.textContent = "Time left: " + minutes + ":" + seconds;
+  // timer.start();
 
-    if (minutes == 0 && seconds == 0) {
-      $("#time-up-dialog").modal();
-    }
-  }
+  // function format(minutes, seconds) {
+  //   minutes = minutes < 10 ? "0" + minutes : minutes;
+  //   seconds = seconds < 10 ? "0" + seconds : seconds;
+  //   display.textContent = "Time left: " + minutes + ":" + seconds;
+
+  //   if (minutes == 0 && seconds == 0) {
+  //     $("#time-up-dialog").modal();
+  //   }
+  // }
 
   $.modal.close();
 });
diff --git a/lib/easytimer.min.js b/lib/easytimer.min.js
new file mode 100644
index 0000000..ca9c46b
--- /dev/null
+++ b/lib/easytimer.min.js
@@ -0,0 +1,7 @@
+/**
+ * easytimer.js
+ * Generated: 2019-12-22
+ * Version: 4.1.1
+ */
+
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define(["exports"],e):e((t=t||self).easytimer={})}(this,function(t){"use strict";function _(t){return(_="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t})(t)}function e(e,t){var n=Object.keys(e);if(Object.getOwnPropertySymbols){var o=Object.getOwnPropertySymbols(e);t&&(o=o.filter(function(t){return Object.getOwnPropertyDescriptor(e,t).enumerable})),n.push.apply(n,o)}return n}function z(r){for(var t=1;t<arguments.length;t++){var i=null!=arguments[t]?arguments[t]:{};t%2?e(Object(i),!0).forEach(function(t){var e,n,o;e=r,o=i[n=t],n in e?Object.defineProperty(e,n,{value:o,enumerable:!0,configurable:!0,writable:!0}):e[n]=o}):Object.getOwnPropertyDescriptors?Object.defineProperties(r,Object.getOwnPropertyDescriptors(i)):e(Object(i)).forEach(function(t){Object.defineProperty(r,t,Object.getOwnPropertyDescriptor(i,t))})}return r}function i(t,e,n){var o,r="";if((t="number"==typeof t?String(t):t).length>e)return t;for(o=0;o<e;o+=1)r+=String(n);return(r+t).slice(-r.length)}function R(){this.secondTenths=0,this.seconds=0,this.minutes=0,this.hours=0,this.days=0,this.toString=function(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:["hours","minutes","seconds"],e=1<arguments.length&&void 0!==arguments[1]?arguments[1]:":",n=2<arguments.length&&void 0!==arguments[2]?arguments[2]:2;t=t||["hours","minutes","seconds"],e=e||":",n=n||2;var o,r=[];for(o=0;o<t.length;o+=1)void 0!==this[t[o]]&&("secondTenths"===t[o]?r.push(this[t[o]]):r.push(i(this[t[o]],n,"0")));return r.join(e)}}var n="undefined"!=typeof window?window.CustomEvent:void 0;"undefined"!=typeof window&&"function"!=typeof n&&((n=function(t,e){e=e||{bubbles:!1,cancelable:!1,detail:void 0};var n=document.createEvent("CustomEvent");return n.initCustomEvent(t,e.bubbles,e.cancelable,e.detail),n}).prototype=window.Event.prototype,window.CustomEvent=n);var B="secondTenths",F="seconds",G="minutes",H="hours",J="days",K=[B,F,G,H,J],N={secondTenths:100,seconds:1e3,minutes:6e4,hours:36e5,days:864e5},Q={secondTenths:10,seconds:60,minutes:60,hours:24},W="undefined"!=typeof module&&module.exports&&"function"==typeof require?require("events"):void 0;function X(){return"undefined"!=typeof document}function Y(){return W}function Z(t,e){return(t%e+e)%e}function o(){var e,n,r,o,i,s,u,c,a,f,d=0<arguments.length&&void 0!==arguments[0]?arguments[0]:{},l=new R,h=new R,p=X()?document.createElement("span"):Y()?new W.EventEmitter:void 0,v=!1,y=!1,m={},b={detail:{timer:this}};function w(t,e){var n,o,r=h[e];return o=C(t,N[n=e]),h[n]=o,l[n]=n===J?o:0<=o?Z(o,Q[n]):Q[n]-Z(o,Q[n]),h[e]!==r}function t(){g(),function(){for(var t in l)l.hasOwnProperty(t)&&"number"==typeof l[t]&&(l[t]=0);for(var e in h)h.hasOwnProperty(e)&&"number"==typeof h[e]&&(h[e]=0)}()}function g(){clearInterval(e),e=void 0,y=v=!1}function O(t){I()?(a=E(),s=V(i.target)):D(t),function(){var t=N[n];if(S(P(Date.now())))return;e=setInterval(j,t),v=!0,y=!1}()}function E(){return P(Date.now())-h.secondTenths*N[B]*r}function j(){var t=P(Date.now());!function(t){t[B]&&M("secondTenthsUpdated",b);t[F]&&M("secondsUpdated",b);t[G]&&M("minutesUpdated",b);t[H]&&M("hoursUpdated",b);t[J]&&M("daysUpdated",b)}(T()),o(b.detail.timer),S(t)&&(U(),M("targetAchieved",b))}function T(t){var e=0<arguments.length&&void 0!==t?t:P(Date.now()),n=0<r?e-a:a-e,o={};return o[B]=w(n,B),o[F]=w(n,F),o[G]=w(n,G),o[H]=w(n,H),o[J]=w(n,J),o}function P(t){return Math.floor(t/N[n])*N[n]}function S(t){return s instanceof Array&&f<=t}function D(t){var e;n=function(t){if(function(t){return 0<=K.indexOf(t)}(t=typeof t==="string"?t:F))return t;throw new Error("Error in precision parameter: ".concat(t," is not a valid value"))}((t=t||{}).precision),o="function"==typeof t.callback?t.callback:function(){},c=!0===t.countdown,r=!0==c?-1:1,"object"===_(t.startValues)?(e=t.startValues,u=x(e),l.secondTenths=u[0],l.seconds=u[1],l.minutes=u[2],l.hours=u[3],l.days=u[4],h=L(u,h)):u=null,a=E(),T(),s="object"===_(t.target)?V(t.target):c?(t.target={seconds:0},V(t.target)):null,m={precision:n,callback:o,countdown:"object"===_(t)&&!0===t.countdown,target:s,startValues:u},i=t}function x(t){var e,n,o,r,i,s;if("object"===_(t))if(t instanceof Array){if(5!==t.length)throw new Error("Array size not valid");s=t}else{for(var u in t)if(K.indexOf(u)<0)throw new Error("Error in startValues or target parameter: ".concat(u," is not a valid input value"));s=[t.secondTenths||0,t.seconds||0,t.minutes||0,t.hours||0,t.days||0]}return e=s[0],n=s[1]+C(e,10),o=s[2]+C(n,60),r=s[3]+C(o,60),i=s[4]+C(r,24),s[0]=e%10,s[1]=n%60,s[2]=o%60,s[3]=r%24,s[4]=i,s}function C(t,e){var n=t/e;return n<0?Math.ceil(n):Math.floor(n)}function V(t){if(t){var e=L(s=x(t));return f=a+e.secondTenths*N[B]*r,s}}function L(t,e){var n=e||{};return n.days=t[4],n.hours=24*n.days+t[3],n.minutes=60*n.hours+t[2],n.seconds=60*n.minutes+t[1],n.secondTenths=10*n.seconds+t[[0]],n}function U(){t(),M("stopped",b)}function k(t,e){X()?p.addEventListener(t,e):Y()&&p.on(t,e)}function A(t,e){X()?p.removeEventListener(t,e):Y()&&p.removeListener(t,e)}function M(t,e){X()?p.dispatchEvent(new CustomEvent(t,e)):Y()&&p.emit(t,e)}function q(){return v}function I(){return y}D(d),void 0!==this&&(this.start=function(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:{};t=z({},d,{},t),q()||(O(t),M("started",b))},this.pause=function(){g(),y=!0,M("paused",b)},this.stop=U,this.reset=function(){t(),O(i),M("reset",b)},this.isRunning=q,this.isPaused=I,this.getTimeValues=function(){return l},this.getTotalTimeValues=function(){return h},this.getConfig=function(){return m},this.addEventListener=k,this.on=k,this.removeEventListener=A,this.off=A)}t.Timer=o,t.default=o,Object.defineProperty(t,"__esModule",{value:!0})});