diff --git a/index.js b/index.js
index 24654ec2d1..ce97aba223 100644
--- a/index.js
+++ b/index.js
@@ -1,3 +1,46 @@
-var kittens = [] //define your array here
+var kittens = ['Milo', 'Otis', 'Garfield'] //define your array here
 
 // Add your functions and code here
+function destructivelyAppendKitten(name) {
+  kittens.push(name)
+  return kittens
+}
+
+function destructivelyPrependKitten(name) {
+kittens.unshift(name)
+return kittens
+}
+
+function destructivelyRemoveLastKitten() {
+kittens.pop()
+return kittens
+}
+
+function destructivelyRemoveFirstKitten() {
+kittens.shift()
+return kittens
+}
+
+function appendKitten(name) {
+var newArray = kittens.slice()
+newArray.push(name)
+return newArray
+}
+
+function prependKitten(name) {
+var newArray = kittens.slice()
+newArray.unshift(name)
+return newArray
+}
+
+function removeLastKitten() {
+var newArray = kittens.slice()
+newArray.pop()
+return newArray
+}
+
+function removeFirstKitten() {
+var newArray = kittens.slice()
+newArray.shift()
+return newArray
+}