diff --git a/day17/ConwayCubes.ts b/day17/ConwayCubes.ts
new file mode 100644
index 0000000..a180007
--- /dev/null
+++ b/day17/ConwayCubes.ts
@@ -0,0 +1,228 @@
+export {};
+
+interface Position {
+    coordinates: [number, number, number];
+    neighbours: Array<[number, number, number]>;
+}
+
+interface Position4 {
+    coordinates: [number, number, number, number];
+    neighbours: Array<[number, number, number, number]>;
+}
+
+interface Cell {
+    active: boolean;
+    position: Position;
+}
+
+interface Cell4 {
+    active: boolean;
+    position: Position4;
+}
+
+const createPosition = (coordinates: [number, number, number]): Position => {
+    let [centerX, centerY, centerZ] = coordinates;
+    let neighbours = [] as [number, number, number][];
+    for (let x = centerX - 1; x <= centerX + 1; x++) {
+        for (let y = centerY - 1; y <= centerY + 1; y++) {
+            for (let z = centerZ - 1; z <= centerZ + 1; z++) {
+                let coord: [number, number, number] = [x, y, z];
+                if (JSON.stringify(coordinates) !== JSON.stringify(coord)) {
+                    neighbours.push(coord);
+                }
+            }
+        }
+    }
+    return { coordinates, neighbours };
+};
+
+const createPosition4D = (
+    coordinates: [number, number, number, number]
+): Position4 => {
+    let [centerX, centerY, centerZ, centerW] = coordinates;
+    let neighbours = [] as [number, number, number, number][];
+    for (let x = centerX - 1; x <= centerX + 1; x++) {
+        for (let y = centerY - 1; y <= centerY + 1; y++) {
+            for (let z = centerZ - 1; z <= centerZ + 1; z++) {
+                for (let w = centerW - 1; w <= centerW + 1; w++) {
+                    let coord: [number, number, number, number] = [x, y, z, w];
+                    if (JSON.stringify(coordinates) !== JSON.stringify(coord)) {
+                        neighbours.push(coord);
+                    }
+                }
+            }
+        }
+    }
+    return { coordinates, neighbours };
+};
+
+/**
+ * Since we are on an infinite Space - let's make sure we get everyone involved...
+ * **/
+const updateCell = (cell: Cell, world: Map<string, Cell>): Cell => {
+    // const aliveNeighbours = Array.from(world.values()).filter((c) => c.active);
+    const aliveNeighbours = cell.position.neighbours
+        .map((p) => world.get(JSON.stringify(p)))
+        .filter((c) => c)
+        .filter((c) => c!.active);
+    // console.log(aliveNeighbours.length);
+
+    if (cell.active) {
+        if (aliveNeighbours.length === 2 || aliveNeighbours.length === 3) {
+            return cell;
+        }
+        return { ...cell, active: !cell.active };
+    }
+    return { ...cell, active: aliveNeighbours.length === 3 };
+};
+
+const updateCell4 = (cell: Cell4, world: Map<string, Cell4>): Cell4 => {
+    const aliveNeighbours = cell.position.neighbours
+        .map((p) => world.get(JSON.stringify(p)))
+        .filter((c) => c)
+        .filter((c) => c!.active);
+    // console.log(aliveNeighbours.length);
+
+    if (cell.active) {
+        if (aliveNeighbours.length === 2 || aliveNeighbours.length === 3) {
+            return cell;
+        }
+        return { ...cell, active: !cell.active };
+    }
+    return { ...cell, active: aliveNeighbours.length === 3 };
+};
+
+const expandWorld = (world: Map<string, Cell>): Map<string, Cell> => {
+    Array.from(world.values()).map((cell) => {
+        cell.position.neighbours.reduce((world, curr) => {
+            if (!world.has(JSON.stringify(curr))) {
+                world.set(JSON.stringify(curr), {
+                    active: false,
+                    position: createPosition(curr),
+                });
+            }
+            return world;
+        }, world);
+    });
+    return world;
+};
+
+const expandWorld4 = (world: Map<string, Cell4>): Map<string, Cell4> => {
+    Array.from(world.values()).map((cell) => {
+        cell.position.neighbours.reduce((world, curr) => {
+            if (!world.has(JSON.stringify(curr))) {
+                world.set(JSON.stringify(curr), {
+                    active: false,
+                    position: createPosition4D(curr),
+                });
+            }
+            return world;
+        }, world);
+    });
+    return world;
+};
+
+const createWorld = (input: string): Map<string, Cell> => {
+    const lines = input.trim().split('\n');
+    const map = lines
+        .map((line, x) =>
+            line
+                .trim()
+                .split('')
+                .map((c, y) => ({
+                    active: c === '#',
+                    position: createPosition([x, y, 0]),
+                }))
+        )
+        .flat(1)
+        .reduce(
+            (map, cell) =>
+                map.set(JSON.stringify(cell.position.coordinates), cell),
+            new Map<string, Cell>()
+        );
+    return map;
+};
+
+const createWorld4D = (input: string): Map<string, Cell4> => {
+    const lines = input.trim().split('\n');
+    const map = lines
+        .map((line, x) =>
+            line
+                .trim()
+                .split('')
+                .map(
+                    (c, y): Cell4 => ({
+                        active: c === '#',
+                        position: createPosition4D([x, y, 0, 0]),
+                    })
+                )
+        )
+        .flat(1)
+        .reduce(
+            (map, cell) =>
+                map.set(JSON.stringify(cell.position.coordinates), cell),
+            new Map<string, Cell4>()
+        );
+    return map;
+};
+
+const updateWorld = (world: Map<string, Cell>): Map<string, Cell> => {
+    let newWorld = expandWorld(world);
+    Array.from(newWorld.entries())
+        .map(
+            ([key, cell]) => [key, updateCell(cell, newWorld)] as [string, Cell]
+        )
+        .reduce((newWorld, [key, cell]) => newWorld.set(key, cell), newWorld);
+    return newWorld;
+};
+
+const updateWorld4D = (world: Map<string, Cell4>): Map<string, Cell4> => {
+    let newWorld = expandWorld4(world);
+    Array.from(newWorld.entries())
+        .map(
+            ([key, cell]) =>
+                [key, updateCell4(cell, newWorld)] as [string, Cell4]
+        )
+        .reduce((newWorld, [key, cell]) => newWorld.set(key, cell), newWorld);
+    return newWorld;
+};
+
+const partOne = async () => {
+    const input: string = await Deno.readTextFile(
+        'day17/input.txt'
+    ).then((f: string) => f.trim());
+    // let world = createWorld(`.#.
+    // ..#
+    // ###`);
+    let world = createWorld(input);
+
+    let gen = 0;
+    while (gen < 6) {
+        // console.log(world);
+        world = updateWorld(world);
+        gen++;
+    }
+
+    console.log(Array.from(world.values()).filter((c) => c.active).length);
+};
+partOne();
+
+const partTwo = async () => {
+    const input: string = await Deno.readTextFile(
+        'day17/input.txt'
+    ).then((f: string) => f.trim());
+    // let world = createWorld4D(`.#.
+    // ..#
+    // ###`);
+    let world = createWorld4D(input);
+
+    let gen = 0;
+    while (gen < 6) {
+        // console.log(world);
+        world = updateWorld4D(world);
+        gen++;
+    }
+
+    console.log(Array.from(world.values()).filter((c) => c.active).length);
+};
+partTwo();
diff --git a/day17/input.txt b/day17/input.txt
new file mode 100644
index 0000000..908ba33
--- /dev/null
+++ b/day17/input.txt
@@ -0,0 +1,8 @@
+..#..#.#
+##.#..#.
+#....#..
+.#..####
+.....#..
+...##...
+.#.##..#
+.#.#.#.#
\ No newline at end of file