diff --git a/4.4this/index.html b/4.4this/index.html
new file mode 100644
index 0000000..ff09cc3
--- /dev/null
+++ b/4.4this/index.html
@@ -0,0 +1,21 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/4.4this/t1.js b/4.4this/t1.js
new file mode 100644
index 0000000..1c20cc9
--- /dev/null
+++ b/4.4this/t1.js
@@ -0,0 +1,18 @@
+let calculator={
+ a: 0,
+ b: 0,
+ read(){
+ this.a = prompt("please type a");
+ this.b = prompt("please type b");
+ },
+ sum(){
+ return Number(this.a) + Number(this.b);
+ },
+ mul(){
+ return this.a * this.b;
+ }
+};
+
+calculator.read();
+alert(calculator.sum());
+alert(calculator.mul());
\ No newline at end of file
diff --git a/4.4this/t2.js b/4.4this/t2.js
new file mode 100644
index 0000000..1f89eae
--- /dev/null
+++ b/4.4this/t2.js
@@ -0,0 +1,16 @@
+let ladder = {
+ step: 0,
+ up() {
+ this.step++;
+ return this;
+ },
+ down() {
+ this.step--;
+ return this;
+ },
+ showStep: function() { // shows the current step
+ alert( this.step );
+ return this;
+ }
+};
+ladder.up().up().down().showStep().down().showStep(); // shows 1 then 0