@jBot-42 (View Post)
I will explain in a better way.
ARAY generates a beam of BRAY, BRAY can be white or orange. If you put PSCN before ARAY and spark it, the beam will be orange, but if you put METL (for example) before ARAY and spark it, the beam will be white.

Orange BRAY replaces white BRAY and passes through it. Orange BRAY also prevents white BRAY from passing through:

Orange and white BRAY can go through INWR.

CRAY creates a beam of its ctype, if for example its ctype is VOID and you put METL behind the CRAY and spark it, it will create a beam of VOID.
Putting PSCN or INWR before CRAY will create different effects, let's look at them
First one is METL, second is PSCN and third is INWR (from top to bottom):

Having INWR before CRAY will give the same effect as having INST before CRAY.
So we learned a lot of things, now let's use what we learned to start making a printer!

As you can see, we first triggered an ARAY that created an orange beam, then we triggered bunch of ARAYs that created white beams, the white beams couldn't pass through the orange beam, but they were able to pass through INWR.

After that, we used CRAY to replace all BRAYs with air, and air with VOID. That created a problem, we want to copy that line of INWR, not create an inverted version of it, so we inverted it once again using another CRAY.

Now if you want to create a functional copy machine, you can use my design and improve it to make it copy multiple lines (that's your new exercise).
If you have any more questions, just ask them and I will try to answer them.

Edit: Forgot one more thing, you can change the tmp value of CRAY to limit how many particles it can create.