diff --git a/asembunny.py b/asembunny.py
index 2f956af..019d5cc 100644
--- a/asembunny.py
+++ b/asembunny.py
@@ -7,20 +7,32 @@ class Command(str, Enum):
     DECREASE = "dec"
     JUMP_NON_ZERO = "jnz"
     TOGGLE = "tgl"
+    OUTPUT = "out"
 
 
 class Computer:
     def __init__(
         self, code: list[tuple[Command, str | int, ...]], reg_a: int = 0, reg_b: int = 0, reg_c: int = 0, reg_d: int = 0
     ):
+        self.code = code
+        self.max_output_len = int(1e12)
+        self.reg = {}
+        self.instr_ptr = 0
+        self.output = []
+        self.reset(reg_a=reg_a, reg_b=reg_b, reg_c=reg_c, reg_d=reg_d)
+
+    def reset(self, reg_a: int = 0, reg_b: int = 0, reg_c: int = 0, reg_d: int = 0):
         self.reg = {
             "a": reg_a,
             "b": reg_b,
             "c": reg_c,
             "d": reg_d,
         }
-        self.code = code
         self.instr_ptr = 0
+        self.output = []
+
+    def set_max_output_len(self, count: int) -> None:
+        self.max_output_len = count
 
     def get_value(self, source: int | str) -> int:
         if isinstance(source, int):
@@ -46,6 +58,13 @@ class Computer:
             elif cmd == Command.DECREASE:
                 self.reg[args[0]] -= 1
                 self.instr_ptr += 1
+            elif cmd == Command.OUTPUT:
+                self.output.append(self.get_value(args[0]))
+                if len(self.output) >= self.max_output_len or (
+                    len(self.output) > 1 and self.output[-1] == self.output[-2]
+                ):
+                    break
+                self.instr_ptr += 1
             elif cmd == Command.JUMP_NON_ZERO:
                 if isinstance(args[0], int):
                     check = args[0]
diff --git a/day25.py b/day25.py
new file mode 100644
index 0000000..87a713f
--- /dev/null
+++ b/day25.py
@@ -0,0 +1,33 @@
+from asembunny import Computer, parse_assembunny_code
+from tools.aoc import AOCDay
+from typing import Any
+
+
+class Day(AOCDay):
+    inputs = [
+        [
+            (198, "input25"),
+        ],
+        [
+            (None, "input25"),
+        ],
+    ]
+
+    def part1(self) -> Any:
+        computer = Computer(parse_assembunny_code(self.getInput()))
+        computer.set_max_output_len(20)
+        ans = 0
+        while True:
+            computer.reset(reg_a=ans)
+            computer.run()
+            if computer.output == [0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1]:
+                return ans
+            ans += 1
+
+    def part2(self) -> Any:
+        return ""
+
+
+if __name__ == "__main__":
+    day = Day(2016, 25)
+    day.run(verbose=True)
diff --git a/inputs/input25 b/inputs/input25
new file mode 100644
index 0000000..30cc487
--- /dev/null
+++ b/inputs/input25
@@ -0,0 +1,30 @@
+cpy a d
+cpy 4 c
+cpy 633 b
+inc d
+dec b
+jnz b -2
+dec c
+jnz c -5
+cpy d a
+jnz 0 0
+cpy a b
+cpy 0 a
+cpy 2 c
+jnz b 2
+jnz 1 6
+dec b
+dec c
+jnz c -4
+inc a
+jnz 1 -7
+cpy 2 b
+jnz c 2
+jnz 1 4
+dec b
+dec c
+jnz 1 -4
+jnz 0 0
+out b
+jnz a -19
+jnz 1 -21