update counting logic to use IN and OUT line to determine direction IN or OUT

config.env.example

@@ -92,9 +92,11 @@ CLASS_OBJECT=object
 OBJECT_CLASS_ID=0
 
 # --- Line crossing ---
-# Two horizontal counting lines:
-#   Line 1 (default ~33%): counts top-to-down (IN)
-#   Line 2 (default ~66%): counts bottom-to-up (OUT)
+# Two horizontal counting lines with sequence logic:
+#   Line 1 (IN):  top→down counts IN  (OUT→IN sequence, or IN-only)
+#   Line 2 (OUT): bottom→up counts OUT (IN→OUT sequence, or OUT-only)
+# Passing the opposite line first only arms; the destination line still counts
+# even if the opposite line was never crossed.
 # Fixed y-coordinate for line 1/IN (overrides LINE_Y1_FRAC if set)
 LINE_Y1=
 # Fraction of frame height for line 1 (default 0.33)