diff --git a/demos/second/part12_plasma/do_plasma.s b/demos/second/part12_plasma/do_plasma.s
index b533156e..bea78d31 100644
--- a/demos/second/part12_plasma/do_plasma.s
+++ b/demos/second/part12_plasma/do_plasma.s
@@ -108,7 +108,7 @@ display_row_sin_smc:
 
 	lda	hposn_high_div8,X					; 4
 	clc								; 2
-	adc	PAGE							; 3
+	adc	DRAW_PAGE						; 3
 	sta	GBASH							; 3
 ; 30
 	lda	#1							; 2
@@ -142,7 +142,7 @@ display_lookup_smc:
 
 ; ============================================================================
 
-	lda	PAGE							; 3
+	lda	DRAW_PAGE						; 3
 	beq	was_page1						; 2/3
 was_page2:
 	bit	PAGE2							; 4
@@ -152,8 +152,9 @@ was_page1:
 	bit	PAGE1							; 4
 	lda	#$20							; 2
 done_pageflip:
-	sta	PAGE							; 3
+	sta	DRAW_PAGE						; 3
 
+plasma_end_smc:
 	lda	#52
 	jsr	wait_for_pattern
 
diff --git a/demos/second/part12_plasma/plasma.s b/demos/second/part12_plasma/plasma.s
index 6a88d5d8..d1baebc4 100644
--- a/demos/second/part12_plasma/plasma.s
+++ b/demos/second/part12_plasma/plasma.s
@@ -74,19 +74,63 @@ div8_loop:
 	;=========================================
 
 	lda	#0
-	sta	PAGE
+	sta	DRAW_PAGE
+
+	;=============================
+	; do blue/orange
+
+	lda	#49
+	sta	plasma_end_smc+1
+
+	jsr	init_plasma_colors
+	jsr	do_plasma
+
+	; drop
+
+
+	;=============================
+	; do purple/green
+
+	ldx	#63
+change_purple:
+	lda	hires_colors_even_lookup_l0,X
+	and	#$7f
+	sta	hires_colors_even_lookup_l0,X
+	dex
+	bpl	change_purple
+
 
 	jsr	init_plasma_colors
 
-; ============================================================================
-
-; 26+( 24*(11+(40*(39+(38*2))) = 110,690 +2174 = 112,864 = 9fps
-; 26+( 24*(11+(40*(39+(38*4))) = 183,650 +2174 = 185,824 = 5.5fps
-; 26+( 24*(11+(40*(39+(38*8))) = 329,570 +2174 = 	 = 3fps
-
+	lda	#50
+	sta	plasma_end_smc+1
 
 	jsr	do_plasma
 
+	; drop
+
+
+
+	;=============================
+	; do black/white?
+
+	ldx	#63
+change_mono:
+	lda	hires_colors_even_lookup_l0,X
+	ora	#$aa
+	sta	hires_colors_even_lookup_l0,X
+	dex
+	bpl	change_mono
+
+	jsr	init_plasma_colors
+
+	lda	#52
+	sta	plasma_end_smc+1
+
+	jsr	do_plasma
+
+
+
 	rts
 
 .include "init_plasma.s"
diff --git a/demos/second/part13_plasmacube/plasmacube.s b/demos/second/part13_plasmacube/plasmacube.s
index 5d403035..5009492e 100644
--- a/demos/second/part13_plasmacube/plasmacube.s
+++ b/demos/second/part13_plasmacube/plasmacube.s
@@ -4,6 +4,7 @@
 
 .include "../hardware.inc"
 .include "../zp.inc"
+.include "../qload.inc"
 .include "../music.inc"
 
 ; =============================================================================
@@ -18,6 +19,14 @@ plasma_main:
         jsr     pt3_set_pattern
 
 
+	lda	#$00
+	sta	DRAW_PAGE
+	sta	clear_all_color+1
+
+	lda	#$04
+	sta	DRAW_PAGE
+	jsr	clear_all
+
 
 	bit	PAGE2		; set page 2
 ;	bit	SET_TEXT	; set text
diff --git a/demos/second/start.s b/demos/second/start.s
index 8cf8ca75..017e5d8d 100644
--- a/demos/second/start.s
+++ b/demos/second/start.s
@@ -397,6 +397,8 @@ load_program_loop2:
 	bit	KEYRESET	; clear keyboard
 
 	; clear text screen
+	lda	#$A0
+	sta	clear_all_color+1
 
 	jsr	clear_all
 
diff --git a/demos/second/zp.inc b/demos/second/zp.inc
index e32e92ae..a6d572ce 100644
--- a/demos/second/zp.inc
+++ b/demos/second/zp.inc
@@ -158,8 +158,6 @@ GRLINEH		= $FB
 
 ; PLASMA
 
-PAGE		= $F2
-
 ; CUBE
 SAVEX		= $F3
 SAVEY		= $F4