diff --git a/rpi/ProotState.py b/rpi/ProotState.py
index 91c64a3..3e525fd 100644
--- a/rpi/ProotState.py
+++ b/rpi/ProotState.py
@@ -16,7 +16,11 @@ class ProotState:
             cls._instance.frame_canvas_prootScreen_1 = False
             cls._instance.frame_canvas_prootScreen_2 = False
             cls._instance.frame_canvas_prootScreen_3 = False
+            cls._instance.matrix = False
         return cls._instance
+    
+    def set_matrix(self, matrix):
+        self.matrix = matrix
 
     def next_blink_frame_number(self) -> int:        
         if self.current_blink_state == self.desired_blink_state == 10:
@@ -78,8 +82,7 @@ class ProotState:
             matrix.SwapOnVSync(self.frame_canvas_prootScreen_3)
 
 
-def update_screen():
-    global blinkFrameCanvases, matrix
+def update_screen(blinkFrameCanvases, matrix):
 
     proot_state = ProotState()
 
@@ -90,9 +93,9 @@ def update_screen():
         proot_state.set_ProotScreen(matrix)
         
 
-def interrupt_timer():
+def interrupt_timer(blinkFrameCanvases, matrix):
     while True:
-        update_screen()
+        update_screen(blinkFrameCanvases, matrix)
         time.sleep(0.01)
 
 
diff --git a/rpi/antRender.py b/rpi/antRender.py
index b233850..54b97f6 100644
--- a/rpi/antRender.py
+++ b/rpi/antRender.py
@@ -29,7 +29,7 @@ blinkFrameCanvases = []
 
 
 # Create and start screen update interrupts
-screen_update_thread = threading.Thread(target=ProotState.interrupt_timer)
+screen_update_thread = threading.Thread(target=ProotState.interrupt_timer(blinkFrameCanvases, matrix))
 screen_update_thread.start()
 
 # Create and start random blinks interrupts