Starting to write code in H2D2

So... my latest attempt at writing a programming language, which I'm currently caling H2D2 is taking shape. I can build loops, assign numeric variables and evaluate expressions. It is still only a subset of the syntax from my original DALIS language, but I am able to write some simple programs now. You know what's coming don't you...? Here's a little something that I've been working on, do you know what it is yet?

e=1.1
d=0
h=0
loop
  b=-2
  loop
    n=0
    r=0
    h=127
    loop
      r=r*r-n*n+b
      n=2*d*n+e
      d=r
      h=h-1
    repeat if ((r*r)+(n*n)<4) & h>32
    print h
    b=b+0.04
  repeat if b<1
  print 13
  e=e-0.1
repeat if e>-1.2

Yup, it's the famous ASCII mandelbrot. You'll also notice that I've switched to lower case for the keywords this time round. I got tired of feeling like I'm shouting when writing code. This version also uses '&' to mean 'logical and', instead of the actual word 'and'. This is the syntax tree that's created when I parse that code:

Well that's progress. It's not bad considering my C is still rusty, but it's coming back to me. I haven't timed anything yet, but it certainly feels faster, on my laptop this program draws the mandelbrot set in about one second I reckon. Of course, I can keep the syntax tree as a kind of compiled bytecode, meaning that the program can be run without the need for the parser, which would make it faster still.