diff --git a/day06.js b/day06.js
new file mode 100644
index 0000000..540f4d0
--- /dev/null
+++ b/day06.js
@@ -0,0 +1,39 @@
+const fs = require("fs");
+
+const fishes = fs
+  .readFileSync("day06.txt", { encoding: "utf-8" }) // read day??.txt content
+  .replace(/[\r\n]/g, "") // remove all \r characters to avoid issues on Windows
+  .split(",") // Split on newline
+  .map(Number); // Parse each string into a number
+
+function part1() {
+  const queue = Array(9).fill(0);
+  for (const fish of fishes) {
+    queue[fish]++;
+  }
+  for (let i = 0; i < 80; i++) {
+    const currentFishes = queue.shift();
+    queue.push(currentFishes);
+    queue[6] += currentFishes;
+  }
+
+  console.log(queue.reduce((a, b) => a + b, 0));
+}
+
+part1();
+
+function part2() {
+  const queue = Array(9).fill(0);
+  for (const fish of fishes) {
+    queue[fish]++;
+  }
+  for (let i = 0; i < 256; i++) {
+    const currentFishes = queue.shift();
+    queue.push(currentFishes);
+    queue[6] += currentFishes;
+  }
+
+  console.log(queue.reduce((a, b) => a + b, 0));
+}
+
+part2();
diff --git a/day06.txt b/day06.txt
new file mode 100644
index 0000000..1e7a8df
--- /dev/null
+++ b/day06.txt
@@ -0,0 +1 @@
+5,1,1,4,1,1,4,1,1,1,1,1,1,1,1,1,1,1,4,2,1,1,1,3,5,1,1,1,5,4,1,1,1,2,2,1,1,1,2,1,1,1,2,5,2,1,2,2,3,1,1,1,1,1,1,1,1,5,1,1,4,1,1,1,5,4,1,1,3,3,2,1,1,1,5,1,1,4,1,1,5,1,1,5,1,2,3,1,5,1,3,2,1,3,1,1,4,1,1,1,1,2,1,2,1,1,2,1,1,1,4,4,1,5,1,1,3,5,1,1,5,1,4,1,1,1,1,1,1,1,1,1,2,2,3,1,1,1,1,1,2,1,1,1,1,1,1,2,1,1,1,5,1,1,1,1,4,1,1,1,1,4,1,1,1,1,3,1,2,1,2,1,3,1,3,4,1,1,1,1,1,1,1,5,1,1,1,1,1,1,1,1,4,1,1,2,2,1,2,4,1,1,3,1,1,1,5,1,3,1,1,1,5,5,1,1,1,1,2,3,4,1,1,1,1,1,1,1,1,1,1,1,1,5,1,4,3,1,1,1,2,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,3,3,1,2,2,1,4,1,5,1,5,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,5,1,1,1,4,3,1,1,4