diff --git a/index.js b/index.js
index 695b9e1..6a7ea54 100644
--- a/index.js
+++ b/index.js
@@ -1 +1,34 @@
 const app = "I don't do much."
+var kittens = ["Milo", "Otis", "Garfield"];
+
+function destructivelyAppendKitten(name) {
+  kittens.push(name);
+}
+
+function destructivelyPrependKitten(name) {
+  kittens.unshift(name);
+}
+
+function destructivelyRemoveLastKitten(name) {
+  kittens.pop(name);
+}
+
+function destructivelyRemoveFirstKitten(name) {
+  kittens.shift(name);
+}
+
+function appendKitten(name) {
+  return [...kittens, name];
+}  
+  
+function prependKitten(name) {
+  return [name, ...kittens];
+}
+
+function removeLastKitten(name) {
+  return kittens.slice(0, kittens.length - 1);
+}
+
+function removeFirstKitten(name) {
+  return kittens.slice(1);
+}
\ No newline at end of file