diff --git a/src/main.py b/src/main.py
new file mode 100644
index 0000000..f96a86e
--- /dev/null
+++ b/src/main.py
@@ -0,0 +1,38 @@
+import RPi.GPIO as io
+import time
+
+io.setmode(io.BCM)
+
+pins = {
+    "red": {
+        "pin": 27,
+        "off": io.HIGH,
+    },
+    "yellow": {
+        "pin": 22,
+        "off": io.HIGH,
+    },
+    "green": {
+        "pin": 24,
+        "off": io.HIGH,
+    },
+    "blue": {
+        "pin": 23,
+        "off": io.HIGH,
+    },
+}
+
+
+def off(pin):
+    return pin["off"]
+
+def on(pin):
+    return io.LOW if pin["off"] == io.HIGH else io.LOW
+
+
+def reset():
+    for name, pin in pins.items():
+        io.setmode(pin["pin"], io.OUT)
+        io.output(pin["pin"], off(pin))
+
+reset()