I've just uploaded two new Thermofax designs to my shop. I think they're just plain fun designs and would make awesome backgrounds for additional designs overlaid on top.
You can buy them in three sizes HERE
This one is called Circle Grid - you can guess why!
And this one is ET Script - where I imagined what ET's handwriting may have looked like if he had to write a letter home instead of phoning!
Don't forget that every screen also comes with its own little scraper. Ready for you to have fun!