diff --git a/2025/day04.ua b/2025/day04.ua
index 59e0aef..8a188c1 100644
--- a/2025/day04.ua
+++ b/2025/day04.ua
@@ -3,10 +3,31 @@
 Input ← Lines &fras "input/day04.txt"
 Wall  ← ≡◇=@@ Input
 
-/⊂ -₁⇡[3 3]
-▽¬⍜⍉(⊡1)⊸⦷0_0
+# Removed ? Wall
+Step ← |1 (
+  /⊂ -₁⇡[3 3]
+  ▽¬⍜⍉(⊡1)⊸⦷0_0
 
-/+ ⬚0˜↻ Wall
-<4
-×Wall
-/+♭
+  /+ ⊸⬚0↻
+  <4
+  ×
+)
+
+# Removed Wall' ? Wall
+Run ← |1.2 (
+  ⍢(
+  | ⊙(
+      ⊸Step
+      ⟜-
+      /+♭
+    )
+    ⤙+
+    ≠₀
+  ) 0
+)
+
+Part₁ ← /+♭ Step
+Part₂ ← ⊙◌ Run
+
+Part₁ Wall
+Part₂ Wall