diff --git a/index.js b/index.js
index 695b9e1..82ff77c 100644
--- a/index.js
+++ b/index.js
@@ -1 +1,38 @@
-const app = "I don't do much."
+kittens =  ["Milo", "Otis", "Garfield"]
+
+var kittens = ["Milo", "Otis", "Garfield"]
+
+function destructivelyAppendKitten(name){
+  kittens.push(name);
+}
+
+function destructivelyPrependKitten(name){
+  kittens.unshift(name);
+}
+
+function destructivelyRemoveLastKitten(){
+  kittens.pop();
+}
+
+function destructivelyRemoveFirstKitten(){
+  kittens.shift();
+}
+
+function appendKitten(name){
+  return [...kittens, name]
+}
+
+
+function prependKitten(name){
+  return [name, ...kittens]
+}
+
+function removeLastKitten(){
+  return kittens.slice(0,kittens.length-1)
+}
+
+
+function removeFirstKitten(){
+  return kittens.slice(1)
+}
+