It works. Like for real.

buildmanjaro.sh

@@ -2,4 +2,6 @@ rm -v test.py
 echo "demo.lua -> 'test.py'"
 ../luajit demo.lua pn.png >> test.py
 rm -v /run/media/user/disk/test.py
+rm -v /run/media/user/disk/draw.py
 cp -v test.py /run/media/user/disk/
+cp -v draw.py /run/media/user/disk/

buildubuntu.sh

@@ -2,4 +2,6 @@ rm -v test.py
 echo "demo.lua -> 'test.py'"
 ../luajit demo.lua pn.png >> test.py
 rm -v /media/user/disk/test.py
+rm -v /media/user/disk/draw.py
 cp -v test.py /media/user/disk/
+cp -v draw.py /media/user/disk/

demo.lua

@@ -34,9 +34,9 @@ for j = 1, image_infos.height, 1 do
 end
 
 --let's write the pallet
-io.write("\"\npallet=(")
-for i, _ in pairs(pallet) do
-  io.write("(", i, "),")
+io.write("\"\npallet={")
+for i, v in pairs(pallet) do
+  io.write(v, ":(", i, "),")
 end
 
-io.write(")\ndraw(data,pallet,", image_infos.width, ")")
+io.write("}\ndraw(data,pallet,", image_infos.width, ")")