diff --git a/assets/scripts/nethack/dungeon.js b/assets/scripts/nethack/dungeon.js
index 0886cd2..f11131b 100644
--- a/assets/scripts/nethack/dungeon.js
+++ b/assets/scripts/nethack/dungeon.js
@@ -81,58 +81,98 @@ class Rect {
 }
 
 class Grid {
-  #width;
-  #height;
-  cells = [];
+  #size;
+  #cells = [];
+
+  #rooms = [];
 
   constructor(width, height) {
-    this.#width = width;
-    this.#height = height;
+    this.#size = new Size(width, height);
 
-    this.cells = new Array(width * height);
-    for (let i = 0; i < this.cells.length; i++) {
-      this.cells[i] = new Cell(" ");
+    this.#cells = new Array(width * height);
+    for (let i = 0; i < this.#cells.length; i++) {
+      this.#cells[i] = new Cell(" ");
     }
   }
 
   get width() {
-    return this.#width;
+    return this.#size.width;
   }
 
   get height() {
-    return this.#height;
+    return this.#size.height;
+  }
+
+  generate(p, roomGenerator) {
+    this.#generateRooms(p, roomGenerator);
+    this.#placeStairs();
+  }
+
+  #generateRooms(p, generator) {
+    this.#rooms = generator.rooms;
+
+    for (let room of this.#rooms) {
+      for (let y = room.minY; y <= room.maxY; y++) {
+        for (let x = room.minX; x <= room.maxX; x++) {
+          let charAtXY = room.charAt(x, y);
+          if (!charAtXY) {
+            continue;
+          }
+
+          let cell = this.cellAt(x, y);
+          cell.character = charAtXY;
+          cell.characterColor = p.color(255);
+        }
+      }
+    }
+  }
+
+  #placeStairs() {
+    const indexOfRoomWithUpStairs = randomInt(this.#rooms.length);
+    const coordinateOfUpStair = this.#rooms[indexOfRoomWithUpStairs].randomPoint();
+    this.cellAt(coordinateOfUpStair.x, coordinateOfUpStair.y).upStair();
+
+    while (true) {
+      let indexOfRoomForDownStair = randomInt(this.#rooms.length);
+      if (indexOfRoomForDownStair == indexOfRoomWithUpStairs) {
+        continue;
+      }
+
+      const coordinateOfDownStair = this.#rooms[indexOfRoomForDownStair].randomPoint();
+      this.cellAt(coordinateOfDownStair.x, coordinateOfDownStair.y).downStair();
+
+      break;
+    }
   }
 
   cellAt(x, y) {
-    return this.cells[y * this.#width + x];
+    return this.#cells[y * this.width + x];
   }
 }
 
 class Room {
-  x = 0;
-  y = 0;
-  width = 0;
-  height = 0;
+  #rect;
 
-  constructor(x, y, w, h) {
-    this.x = x;
-    this.y = y;
-    this.width = w;
-    this.height = h;
+  constructor(rect) {
+    this.#rect = rect;
   }
 
-  get maxX() {
-    return this.x + this.width;
-  }
+  get minX() { return this.#rect.minX; }
+  get minY() { return this.#rect.minY; }
+  get maxX() { return this.#rect.maxX; }
+  get maxY() { return this.#rect.maxY; }
 
-  get maxY() {
-    return this.y + this.height;
+  randomPoint() {
+    return new Point(
+      this.#rect.minX + 1 + randomInt(this.#rect.size.width - 2),
+      this.#rect.minY + 1 + randomInt(this.#rect.size.height - 2)
+    );
   }
 
   charAt(x, y) {
-    const minX = this.x;
-    const minY = this.y;
-    const maxX = this.maxX
+    const minX = this.minX;
+    const minY = this.minY;
+    const maxX = this.maxX;
     const maxY = this.maxY;
 
     if (y == minY && x == minX) { return "┌"; }