diff --git a/04week/loop.js b/04week/loop.js
index e69de29bb..9876194d9 100644
--- a/04week/loop.js
+++ b/04week/loop.js
@@ -0,0 +1,52 @@
+'use strict'
+
+let carsInReverse_Log = function () {
+    let carsInReverse = ['Ford', 'Chevy', 'Honda', 'Toyota', 'Tesla', 'Nissan', 'Kia'];
+    for (let i = 0; i < carsInReverse.length; i++) {
+        console.log(carsInReverse[i]);
+    }
+};
+
+let createObject = function(){
+    let someObject = {        
+        firstName: "Jane",
+        lastName: "Doe",
+        birthDate: "Jan 5, 1925",
+        gender: "female"
+    }
+    return someObject;
+};
+
+let someObject_KeyLog = function (someObject) {
+    for (let keys in someObject) {
+        console.log(keys);
+    }
+};
+
+let someObject_Birthday = function (someObject) {
+    for (let birthDate in someObject) {
+        if(birthDate === "birthDate"){
+            console.log(someObject[birthDate]);
+        }
+    }
+};
+
+let countTo1000_While = function(number){
+    while ( number <= 1000){
+        console.log(number);
+        number++
+    }
+};
+
+let countTo1000_DoWhile = function(number){
+    do {
+        console.log(number)
+        number++
+    } while(number <= 1000)
+};
+
+carsInReverse_Log();
+someObject_KeyLog(createObject());
+someObject_Birthday(createObject());
+countTo1000_While(1);
+countTo1000_DoWhile(1);