diff --git a/clouserTask.js b/clouserTask.js
new file mode 100644
index 0000000..2bd27f1
--- /dev/null
+++ b/clouserTask.js
@@ -0,0 +1,20 @@
+var Circle = (function() {
+  var instance;
+    size=100;     
+  function Circle() {
+    if (instance) return instance;
+    instance = this;
+  }
+    
+ 
+  Circle.prototype.getSize =function() {return size;};
+  Circle.prototype.setSize =function(size) {  this.size=size;};
+
+  return Circle;
+})();
+const a = new Circle();
+const b = new Circle();
+console.log(a==b);
+a.setSize(200);
+console.log(a.getSize());
+