diff --git a/graphics/gr/rotozoom/roto.s b/graphics/gr/rotozoom/roto.s
index 4a97f4b9..3d022db2 100644
--- a/graphics/gr/rotozoom/roto.s
+++ b/graphics/gr/rotozoom/roto.s
@@ -93,6 +93,21 @@ refresh_image:
 
 at_far_end:
 
+	; change bg color
+	lda	roto_color_even_smc+1
+	clc
+	adc	#$01
+	and	#$0f
+	sta	roto_color_even_smc+1
+
+	lda	roto_color_odd_smc+1
+	clc
+	adc	#$10
+	and	#$f0
+	sta	roto_color_odd_smc+1
+
+
+
 	; reverse direction
 	lda	direction
 	eor	#$ff
diff --git a/graphics/gr/rotozoom/rotozoom.s b/graphics/gr/rotozoom/rotozoom.s
index 6cfa16e5..14ccba65 100644
--- a/graphics/gr/rotozoom/rotozoom.s
+++ b/graphics/gr/rotozoom/rotozoom.s
@@ -219,6 +219,7 @@ rotozoom_xloop:
 	;	on the edges of the screen?  Tricky due to Apple II
 	;	interlacing
 
+roto_color_even_smc:
 	lda	#0	; default color					; 2
 
 	ldy	XPH							; 3
@@ -413,6 +414,7 @@ rotozoom_xloop2:
 	;	on the edges of the screen?  Tricky due to Apple II
 	;	interlacing
 
+roto_color_odd_smc:
 	lda	#0	; default color					; 2
 
 	ldy	XPH							; 3