if you are lazy, just hit the button, the defaults work ok


width: height:
random fg color
if not, what values for R/G/B? this is what the color is multiplied by, so you should use numbers like 0.5, 0.8, 1.2, 1.5, 2, etc. anything over 2-5 is going to produce extreme results. if the above box is checked, these are ignored.
r
g
b

random bg color
shape? checked=rectangle, unchecked=circle
speckly fg colors? (looks better than it sounds) if so, then what values for min/max? the color is multiplied by a random number in between these two numbers - divided by 10. so anything from 1 to 20 or 30 probably.
min
max
choose one or the other. if you choose them both, you'll get the first one.
want a weird cut-off edge? its hard to explain, try and see.
a strange, tv-snow like outer region? again, hard to explain.
what letter(s) do you want repeated? you probably should only put one or two letters here, or the page will be freaking huge. you can put a space if you want. the best looking letters tend to be really big or really small. i.e. Q's, 8's, periods, backticks, etc.

pad each letter with a space next to it? it tends to offset the tall shape of letters, and makes things more square. or something.