diff --git a/11/part2.py b/11/part2.py
new file mode 100644
index 0000000..5fba5b2
--- /dev/null
+++ b/11/part2.py
@@ -0,0 +1,72 @@
+
+initialState = []
+with open("input.txt", "r") as f:
+	initialState = f.read().split("\n")
+
+stateWidth = len(initialState[0])
+stateHeight = len(initialState)
+
+def areSeatsOccupied(state: list, x, y, dx, dy):
+	while True:
+		x += dx
+		y += dy
+		if x < 0 or x >= stateWidth or y < 0 or y >= stateHeight:
+			return False
+		if state[y][x] == "L":
+			return False
+		if state[y][x] == "#":
+			return True
+
+def getNumOfAdjecentOccupiedSeats(state: list, x, y):
+	return areSeatsOccupied(state, x, y, -1, -1) \
+			 + areSeatsOccupied(state, x, y,  0, -1) \
+			 + areSeatsOccupied(state, x, y, +1, -1) \
+			 + areSeatsOccupied(state, x, y, -1,  0) \
+			 + areSeatsOccupied(state, x, y, +1,  0) \
+			 + areSeatsOccupied(state, x, y, -1, +1) \
+			 + areSeatsOccupied(state, x, y,  0, +1) \
+			 + areSeatsOccupied(state, x, y, +1, +1)
+
+def computeNextState(state: list):
+	nexState = state.copy()
+	for y in range(stateHeight):
+		newLine = []
+		for x in range(stateWidth):
+			if state[y][x] == ".":
+				newLine.append(".")
+			elif state[y][x] == "L":
+				occupiedSeats = getNumOfAdjecentOccupiedSeats(state, x, y)
+				if occupiedSeats == 0:
+					newLine.append("#")
+				else:
+					newLine.append("L")
+			else: # if x == "#"
+				occupiedSeats = getNumOfAdjecentOccupiedSeats(state, x, y)
+				if occupiedSeats >= 5:
+					newLine.append("L")
+				else:
+					newLine.append("#")
+		nexState[y] = "".join(newLine)
+
+	return nexState
+
+def getNumOfOccupiedSeats(state: list):
+	count = 0
+	for line in state:
+		count += line.count("#")
+	return count
+
+def printState(state: list):
+	print("---------------")
+	for line in state:
+		print(line)
+
+lastState = initialState
+currentState = initialState
+while True:
+	lastState = currentState
+	currentState = computeNextState(currentState)
+	if currentState == lastState:
+		break
+
+print(getNumOfOccupiedSeats(currentState))
\ No newline at end of file
diff --git a/11/test2.txt b/11/test2.txt
new file mode 100644
index 0000000..07f019f
--- /dev/null
+++ b/11/test2.txt
@@ -0,0 +1,3 @@
+.............
+.L.L.#.#.#.#.
+.............
\ No newline at end of file
diff --git a/11/test3.txt b/11/test3.txt
new file mode 100644
index 0000000..74c3c6f
--- /dev/null
+++ b/11/test3.txt
@@ -0,0 +1,7 @@
+.##.##.
+#.#.#.#
+##...##
+...L...
+##...##
+#.#.#.#
+.##.##.
\ No newline at end of file