diff --git a/Day11/Octopus.ts b/Day11/Octopus.ts
new file mode 100644
index 0000000..341a745
--- /dev/null
+++ b/Day11/Octopus.ts
@@ -0,0 +1,127 @@
+import { readLines } from "https://deno.land/std@0.177.1/io/read_lines.ts";
+
+async function Part1(generations: number) {
+    const file = await Deno.open("./Day11/input.txt");
+    const lines = readLines(file);
+
+    let flashes = 0;
+    const levels: number[][] = [];
+    const neighbours = [[-1,-1],[-1,0],[-1,1],[0,-1],[0,1],[1,-1],[1,0],[1,1]]
+
+    for await (const line of lines) {
+        levels.push([]);
+        const initialLevels = line.split("");
+        for (const n of initialLevels) {
+            levels[levels.length - 1].push(+n);
+        }
+    }
+
+    for (let g = 0; g < generations; g++) {
+        const coords: number[][] = []
+        for (const i in levels) {
+            for (const j in levels[i]) {
+                coords.push([+i,+j]);
+            }
+        }
+        
+        while (coords.length != 0) {
+            const [i,j]: number[] = coords.pop()!;
+            if (levels[i][j] >= 9) {
+                flashes++;
+                levels[i][j] = -1;
+                for (const [a,b] of neighbours) {
+                    if (!(0 <= i + a && i + a <= levels.length - 1 && 0 <= j + b && j + b <= levels[i].length - 1)) {
+                        continue
+                    }
+                    if (levels[i + a][j + b] != -1) {
+                        levels[i + a][j + b]++;
+                        if (levels[i + a][j + b] > 9) {
+                            coords.push([i + a, j + b]);
+                        }
+                    }
+                }
+            } else {
+                if (levels[i][j] != -1) {
+                    levels[i][j]++;
+                }
+            }
+        }
+
+        for (const i in levels) {
+            for (const j in levels[i]) {
+                if (levels[i][j] == -1) {
+                    levels[i][j] = 0;
+                }
+            }
+        }
+
+    }
+    return flashes
+}
+
+async function Part2() {
+    const file = await Deno.open("./Day11/input.txt");
+    const lines = readLines(file);
+
+    let lastFlashes = 0;
+    let generation = 0;
+    const levels: number[][] = [];
+    const neighbours = [[-1,-1],[-1,0],[-1,1],[0,-1],[0,1],[1,-1],[1,0],[1,1]]
+
+    for await (const line of lines) {
+        levels.push([]);
+        const initialLevels = line.split("");
+        for (const n of initialLevels) {
+            levels[levels.length - 1].push(+n);
+        }
+    }
+
+    while (lastFlashes != levels.length * levels[0].length) {
+        lastFlashes = 0;
+        generation++;
+
+        const coords: number[][] = []
+        for (const i in levels) {
+            for (const j in levels[i]) {
+                coords.push([+i,+j]);
+            }
+        }
+        
+        while (coords.length != 0) {
+            const [i,j]: number[] = coords.pop()!;
+            if (levels[i][j] >= 9) {
+                lastFlashes++;
+                levels[i][j] = -1;
+                for (const [a,b] of neighbours) {
+                    if (!(0 <= i + a && i + a <= levels.length - 1 && 0 <= j + b && j + b <= levels[i].length - 1)) {
+                        continue
+                    }
+                    if (levels[i + a][j + b] != -1) {
+                        levels[i + a][j + b]++;
+                        if (levels[i + a][j + b] > 9) {
+                            coords.push([i + a, j + b]);
+                        }
+                    }
+                }
+            } else {
+                if (levels[i][j] != -1) {
+                    levels[i][j]++;
+                }
+            }
+        }
+
+        for (const i in levels) {
+            for (const j in levels[i]) {
+                if (levels[i][j] == -1) {
+                    levels[i][j] = 0;
+                }
+            }
+        }
+
+    }
+    return generation
+
+}
+
+console.log("Part1: " + await Part1(100));
+console.log("Part2: " + await Part2());
\ No newline at end of file
diff --git a/Day11/input.txt b/Day11/input.txt
new file mode 100644
index 0000000..1d764ea
--- /dev/null
+++ b/Day11/input.txt
@@ -0,0 +1,10 @@
+4836484555
+4663841772
+3512484556
+1481547572
+7741183422
+8683222882
+4215244233
+1544712171
+5725855786
+1717382281