diff --git a/src/background.c b/src/background.c
index fc3b1ba..ad9e9ce 100644
--- a/src/background.c
+++ b/src/background.c
@@ -1,9 +1,10 @@
 #include "lzy.h"
 #include "cfg.h"
 #include "rotrect.h"
+#include "game.h"
 #include <math.h>
 
-long tick = 0;
+double tick = 0;
 
 static void
 draw_square(double size, double angle)
@@ -11,12 +12,20 @@ draw_square(double size, double angle)
 	rotrect(DISPLAY_WIDTH / 2.0, DISPLAY_HEIGHT / 2.0, size, size, angle);
 }
 
+void
+background_update(Game *g)
+{
+	if (game_entity_count(g, ET_player) > 0)
+		tick += 1.0;
+	else
+		tick += 0.25;
+}
+
 void
 background_draw(void)
 {
-	tick += 1;
 	LZY_DrawSetColor(BLACK);
-	draw_square(300 * sin((double)tick / 50), (double)tick / 40);
-	draw_square(300 * sin((double)tick / 40), (double)tick / 30);
-	draw_square(300 * sin((double)tick / 30), (double)tick / 20);
+	draw_square(300 * sin(tick / 50), tick / 40);
+	draw_square(300 * sin(tick / 40), tick / 30);
+	draw_square(300 * sin(tick / 30), tick / 20);
 }
diff --git a/src/background.h b/src/background.h
index def5923..c0c078a 100644
--- a/src/background.h
+++ b/src/background.h
@@ -1,3 +1,5 @@
 #pragma once
+#include "game.h"
 
+void background_update(Game *g);
 void background_draw(void);
diff --git a/src/game.c b/src/game.c
index 615e06e..665363d 100644
--- a/src/game.c
+++ b/src/game.c
@@ -88,3 +88,12 @@ game_create_entity(Game *this)
 	this->uuid += 1;
 	return e;
 }
+
+int
+game_entity_count(Game *this, unsigned int type)
+{
+	int count = 0;
+	for (int i = 0; i < MAX_ENTITIES; i++)
+		count += (this->entities[i].type == type);
+	return count;
+}
diff --git a/src/game.h b/src/game.h
index 96b264f..ebb5c09 100644
--- a/src/game.h
+++ b/src/game.h
@@ -16,3 +16,4 @@ void game_update(Game *this);
 void game_draw(Game *this);
 void game_restart_scene(Game *this);
 Entity *game_create_entity(Game *this);
+int game_entity_count(Game *this, unsigned int type);
diff --git a/src/main.c b/src/main.c
index f9ae592..ff69d98 100644
--- a/src/main.c
+++ b/src/main.c
@@ -27,6 +27,7 @@ int main(void)
 		LZY_CycleEvents();
 		input_update();
 		game_update(game);
+		background_update(game);
 
 		LZY_DrawBegin();
 		LZY_DrawSetColor(WHITE);
diff --git a/src/spike.c b/src/spike.c
index 4173729..3c5a8d3 100644
--- a/src/spike.c
+++ b/src/spike.c
@@ -1,13 +1,13 @@
 #include "entityimpl.h"
 #include "rotrect.h"
 
-extern long tick;
+extern double tick;
 
 IMPL_UPDATE() {
 } IMPL_END
 
 IMPL_DRAW() {
-	const double angle = (float)tick / 16;
+	const double angle = tick / 16;
 	rotrect(this->pos[0], this->pos[1], 10, 10, angle);
 	rotrect(this->pos[0], this->pos[1], 10, 10, -angle);
 } IMPL_END