Add blink helper

src/main.py

@@ -18,6 +18,12 @@ class Pin:
     def on(self):
         io.output(self.pin, io.LOW if self.off_mode == io.HIGH else io.HIGH)
 
+    def blink(self, blinks, blink_time_s):
+        for _ in range(0, blinks):
+            self.on()
+            time.sleep(blink_time_s)
+            self.off()
+
 pins = {
     "red": Pin(27),
     "yellow": Pin(22),
@@ -28,9 +34,6 @@ pins = {
 def reset():
     for name, pin in pins.items():
         pin.setup()
-        pin.off()
-        pin.on()
-        time.sleep(1)
-        pin.off()
+        pin.blink(3, 0.3)
 
 reset()