diff --git a/src/handler/matrix_display.py b/src/handler/matrix_display.py
index 1355661..b02be0d 100644
--- a/src/handler/matrix_display.py
+++ b/src/handler/matrix_display.py
@@ -68,9 +68,9 @@ class MatrixDisplay:
         with canvas(self.device) as draw:
             draw.rectangle((0, 0, 31, 7), outline="white", fill="white")
 
-    async def pattern(self, pattern: str = "0,1", step_ms: int = 500):
+    async def pattern(self, pattern: str = "01", step_ms: int = 500):
         # Parse
-        pattern_steps = [step.strip() == "1" for step in pattern.split(",") if step]
+        pattern_steps = [step.strip() == "1" for step in pattern]
         # Execute
         for step in pattern_steps:
             if step:
diff --git a/src/main.py b/src/main.py
index 1b7c9f4..13dbfe5 100644
--- a/src/main.py
+++ b/src/main.py
@@ -101,7 +101,7 @@ async def flash(count: int = 1, contrast: Optional[int] = None):
 
 
 @app.post("/pattern")
-async def flash(pattern: str = "0,1", step_ms: int = 500):
+async def flash(pattern: str = "01", step_ms: int = 500):
     await queue.set_idle_action(display_pattern, pattern=pattern, step_ms=step_ms)
     return {"message": "Activated pattern."}