diff --git a/Makefile b/Makefile
index 9a00152..06fde2d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,11 +1,11 @@
-all : sample0.xex sample1.xex sample2.xex sample3.xex sample4.xex sample5.xex sample6.xex fruit.xex mapclock.xex sailboat.xex sunset.xex train404.xex
+all : sample0.xex sample1.xex sample2.xex sample3.xex sample4.xex sample5.xex sample6.xex fruit.xex mapclock.xex sailboat.xex sunset.xex train404.xex potato.xex
 
 # sample5.s from sample5.jpg
 
 # reminder: $< is input
 #           $@ is output
 
-%.s : %.jpg dither-image.js
+%.s : %.jpg dither-image.js gif.sh mp4.sh
 	node dither-image.js $< $@
 	./gif.sh $@
 	./mp4.sh $@
@@ -16,7 +16,7 @@ chickens.s : chickens.wav pack-wav.js
 %.o : %.s
 	ca65 -v -t atari -o $@ $<
 
-%.xex : %.o dither4.o chickens.o
+%.xex : %.o dither4.o chickens.o atari-asm-xex.cfg
 	ld65 -v -C ./atari-asm-xex.cfg -o $@ dither4.o chickens.o $<
 
 clean :
diff --git a/gif.sh b/gif.sh
index f735379..10f35e4 100755
--- a/gif.sh
+++ b/gif.sh
@@ -8,5 +8,6 @@ ffmpeg \
 ffmpeg \
     -r $fps -i "$1.%01d.png" \
     -i "$1.palette.png" \
-    -lavfi "paletteuse[1],[1]scale=w=640:h=384:sws_flags=neighbor" \
+    -lavfi "[0]scale=w=800:h=480:sws_flags=neighbor[scaled];\
+            [scaled][1]paletteuse=dither=none" \
     -y "$1.gif"
diff --git a/mp4.sh b/mp4.sh
index fe49255..452f050 100755
--- a/mp4.sh
+++ b/mp4.sh
@@ -2,6 +2,6 @@ fps=60000/1001
 
 ffmpeg \
     -r $fps -i "$1.%01d.png" \
-    -vf scale=w=640:h=384:sws_flags=neighbor,format=yuv420p \
+    -vf scale=w=800:h=480:sws_flags=neighbor,format=yuv420p \
     -g 480 \
     -y "$1.mp4"
diff --git a/potato.jpg b/potato.jpg
new file mode 100644
index 0000000..2ff6d6b
Binary files /dev/null and b/potato.jpg differ