diff --git a/python/sep30/level3/numberOfSteps.py b/python/sep30/level3/numberOfSteps.py
index 9400213..fa032a3 100644
--- a/python/sep30/level3/numberOfSteps.py
+++ b/python/sep30/level3/numberOfSteps.py
@@ -6,7 +6,7 @@ def numberOfSteps(bricks: int) -> int:
     Given a number of bricks return how many steps would be required to use them all given that:
     S(0) = 0
     S(n) = S(n-1) + n
-    Formula: `n=(-1+sqrt(1+8*bricks))/2`
+    Formula: `S=(-1+sqrt(1+8*n))/2`
     """
     return ceil((-1 + sqrt(1 + 8 * bricks)) / 2)
 
diff --git a/python/sep30/level4/blendColors.py b/python/sep30/level4/blendColors.py
index 668027e..5e91ceb 100644
--- a/python/sep30/level4/blendColors.py
+++ b/python/sep30/level4/blendColors.py
@@ -1,10 +1,21 @@
+def blendComponent(c1: int, c2: int) -> int:
+    """Get the median of 2 numbers."""
+    return round((c1 + c2) / 2)
+
+
 def blendColors(rgb1: int, rgb2: int) -> int:
     """Blend two colors represented as RGB values."""
+    # Fill values and split into individual components
     (r1, g1, b1) = [int(str(rgb1).zfill(9)[i : i + 3]) for i in range(0, 9, 3)]
     (r2, g2, b2) = [int(str(rgb2).zfill(9)[i : i + 3]) for i in range(0, 9, 3)]
     # Calculate the average of each color component
-    (r3, g3, b3) = [round((r1 + r2) / 2), round((g1 + g2) / 2), round((b1 + b2) / 2)]
+    (r3, g3, b3) = [
+        blendComponent(r1, r2),
+        blendComponent(g1, g2),
+        blendComponent(b1, b2),
+    ]
     (final_r, final_g, final_b) = [str(x).zfill(3) for x in (r3, g3, b3)]
+    # Compose components and cast to integer
     return int(final_r + final_g + final_b)