Got it working, written in standard posix shell script, how about that
If there is an gfx artist out there reading this: lockscreen image 1080x1440 png would be really appreciated
But im stuck after loading koreader, i need to enable the lock when going to sleep.
I tried everything but i cannot find what events control the power button.
Also i need to enable to light by default, still looking into that.
Need some more

though