Make alternating pattern timing independent of n1

- Changed alternating pattern to return delay/2 instead of delay
- Each phase now lasts delay/2, making full cycle equal to delay
- n1 now only controls ON/OFF segment width, not timing

src/patterns.py

@@ -109,7 +109,7 @@ class Patterns(PatternBase): # Inherit from PatternBase
 
         self.n.write()
         self.step = (self.step + 1) % 2
-        return self.delay
+        return max(1, int(self.delay // 2))
     
 
     def pulse(self):