Minecraft - Magic fire

I created a really special fire place! The wood arround it won't ever burn or set on fire! You can't ever be armed by the fire! With the same technique, I added fire to a tree, it looks like it is burning but it ain't

Also, I made a pretty compare 16-digit locked door!
I could turn it into a 32-digit locked door but it's pretty useless. A 16 -digit gate has 65536 possibilities It's nearly impossible to open it without the combinasion While a 32-digit locked door has 4294967296 possibilities. It's just impossible to open it xDD