Just ran this on my K4 with Kite. The text appeared as white on top of my home screen, also the script would not stop running! haha, I hit the home button, went to the settings page, but the script was still drawing tiny white characters on the screen
I had to restart the kindle to get it back to normal. Just thought I'd give you some feedback, I am not sure if this is normal lol
EDIT>> Disregard my comment about the script not stopping, I must have accidentally started the script more than once. Also, I ended up running the script and then displaying a black png on the screen to get a clear view of the output. Here is what I found.
I am guessing the text is showing as white boxes because the letters are actually bits of a png image. Not sure if what I am sharing is helping at all
but I thought I'd chime in.