diff --git a/2015/3/part2.py b/2015/3/part2.py
new file mode 100644
index 0000000..e303b15
--- /dev/null
+++ b/2015/3/part2.py
@@ -0,0 +1,38 @@
+
+# lets just make it object oriented wtf
+class Dud ():
+	def __init__ (self):
+		self.x = 0
+		self.y = 1
+
+	def do(self, command):
+		if command == ">":
+			self.x += 1
+		elif command == "<":
+			self.x -= 1
+		elif command == "^":
+			self.y += 1
+		elif command == "v":
+			self.y -= 1
+
+
+with open("input.txt", "r") as commands:
+	santa = Dud()
+	robo = Dud()
+
+	history = set()
+	num = 0
+	for command in commands.readlines()[0]:
+		dud = santa if num % 2 == 0 else robo
+		dud.do(command)
+
+		history.add((dud.x, dud.y))
+		
+		num += 1
+	print(len(history))
+	commands.close()
+
+
+
+
+
diff --git a/README.md b/README.md
index 89d34dd..7c9c562 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,8 @@ It's a fun challenge from [here](https://adventofcode.com).
 * [2015](https://adventofcode.com/2015)
     * [1](https://adventofcode.com/2015/day/1) * *
     * [2](https://adventofcode.com/2015/day/2) * *
-    * [2](https://adventofcode.com/2015/day/3)
+    * [3](https://adventofcode.com/2015/day/3) * *
+    * [4](https://adventofcode.com/2015/day/4)
 * [2016](https://adventofcode.com/2016)
 * [2017](https://adventofcode.com/2017)
 * [2018](https://adventofcode.com/2018)