diff --git a/ostinato_and_interrupt_score.pdf b/ostinato_and_interrupt_score.pdf
index 2311933..0a9267d 100644
Binary files a/ostinato_and_interrupt_score.pdf and b/ostinato_and_interrupt_score.pdf differ
diff --git a/supercollider/ostinato_and_interrupt_gui_generator_function.scd b/supercollider/ostinato_and_interrupt_gui_generator_function.scd
index dd14703..a34291f 100644
--- a/supercollider/ostinato_and_interrupt_gui_generator_function.scd
+++ b/supercollider/ostinato_and_interrupt_gui_generator_function.scd
@@ -27,7 +27,9 @@
 		if(sec.size == 1, {sec = "0" ++ sec}, {});
 		min ++ ":" ++ sec
 	};
-	metronomeStringFunc = { arg div; case {div % 20 < 2} {"◘"} {div % 4 < 2} {"●"} {true} {" "} };
+	// [-30, -105, -104].asAscii and [-30, -105, -113].asAscii are unicode inverse bullet and normal bullet, respectively
+	metronomeStringFunc = { arg div; case {div % 20 < 2}
+		{[-30, -105, -104].asAscii} {div % 4 < 2} {[-30, -105, -113].asAscii} {true} {" "} };
 	metronomeColorFunc = { arg div; case {div % 20 < 2} {Color.red} {div % 4 < 2} {Color.blue} {true} {Color.black} };
 
 	~appStatusFunc = Task({
@@ -100,7 +102,7 @@
 			[VLayout(generator, nil,
 				HLayout(clock = StaticText(win).string_("00:00").font_(Font("Monaco", 200)),
 				StaticText(win).string_("|").font_(Font("Monaco", 200)),
-				metronome = StaticText(win).string_("◘").font_(Font("Monaco", 300)).stringColor_(Color.red)),
+				metronome = StaticText(win).string_([-30, -105, -104].asAscii).font_(Font("Monaco", 300)).stringColor_(Color.red)),
 				nil, transport
 	), alignment: \top])) };
 	faderViews = { |group|