diff --git a/src/handler/matrix_display.py b/src/handler/matrix_display.py
index 6629272..ee7d11a 100644
--- a/src/handler/matrix_display.py
+++ b/src/handler/matrix_display.py
@@ -26,7 +26,7 @@ class MatrixDisplay:
         Args:
             contrast (int): [0, 255]
         """
-        super().set_contrast(contrast)
+        self.contrast = contrast
         self.device.contrast(self.contrast)
 
     def show_text(self, text):
diff --git a/src/main.py b/src/main.py
index e334d41..4669cb6 100644
--- a/src/main.py
+++ b/src/main.py
@@ -5,7 +5,13 @@ from typing import Optional
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 
-from actions import climate_sensor, display_time, log_temperature, matrix_display
+from actions import (
+    climate_sensor,
+    display_time,
+    log_temperature,
+    matrix_display,
+    display_pattern,
+)
 from config import climate_log_file
 from handler.action_queue import ActionQueue
 from handler.history import get_recent_entries
@@ -93,7 +99,7 @@ async def flash(count: int = 1, contrast: Optional[int] = None):
 @app.post("/pattern")
 async def flash(pattern: str="0,1", off_ms: int = 500, on_ms: int = 500):
     await queue.set_idle_action(
-        matrix_display.pattern, pattern=pattern, off_ms=off_ms, on_ms=on_ms
+        display_pattern, pattern=pattern, off_ms=off_ms, on_ms=on_ms
     )
     return {"message": "Activated pattern."}