diff --git a/index.html b/index.html
index ef9a207..2eec57c 100644
--- a/index.html
+++ b/index.html
@@ -35,8 +35,10 @@
-
- The quickest of brown foxes.
+
+
+
+
diff --git a/js/slide22.js b/js/slide22.js
index e69de29..cc181ed 100644
--- a/js/slide22.js
+++ b/js/slide22.js
@@ -0,0 +1,45 @@
+function square(){
+ do{
+ var v = prompt("Please input an integer");
+ }while(v <= 0 || v >= 100)
+ console.log(v *v);
+}
+
+function interval(){
+ var start = prompt("please enter L:");
+ var end = prompt("please enter U:");
+ var string = "";
+ for(var i = start; i < end; i++){
+ string = string + i + " ";
+ }
+ console.log(string);
+}
+
+function editArray(){
+var myData = new Array(); //initializing an array
+for(var i = 0; i < 10; i++){
+ myData[i] = 1;
+ console.log(myData[i]);
+}
+var index = 0; //default untyped, should give a value
+var value;
+while(index >= 0 && index < 10){
+ index = prompt("input the cell index ");
+ value = prompt("input its value");
+ myData[index] = parseInt(value);
+ console.log(myData);
+}
+}
+
+function fib(n){
+ if (n == 0) return 0;
+ if (n == 1) return 1;
+ if (n == 2) return 1;
+ return fib(n-1)+fib(n-2);
+}
+
+function output() {
+ for (var i = 0; i < 60; i++){
+ console.log(fib(i));
+}
+}