Small fixes

src/main.py

@@ -32,6 +32,22 @@ async def start_time_loop():
     return {"message": "Time loop started"}
 
 
+@app.post("/off")
+async def turn_off():
+    global should_run_time_loop
+    should_run_time_loop = False
+    matrix_display.turn_off()
+    return {"message": "Display turned off"}
+
+
+@app.post("/flash")
+async def flash(count: int = 1):
+    global should_run_time_loop
+    should_run_time_loop = False
+    matrix_display.flash(count)
+    return {"message": "Display flashed"}
+
+
 @app.post("/message")
 async def display_message(body: dict):
     global should_run_time_loop