Playfield Help?

[FudgeFiddle]

Hi all. I'm having an issue with the playfield. I want to make the title screen so that the top words flash in different colors while the bottom words are red. Here is the code:

 set kernel_options pfcolors

_Title
 playfield:
 (Omitted for brevity)
end
 e=rand
 pfcolors:
 e
 e
 e
 e
 e
 e
 $40
 $40
 $40
 $40
 $40
end
 drawscreen
 if joy0fire then goto _Start
 goto _Title

So if I did this correctly shouldn't the top area change for each frame as the variable picks a new random number each time? Instead it just shows a light green every time. Am I doing this wrong or something?

[bogax]

The playfield colors are in table(s) in ROM and
can't be changed.

I suppose it might just barely be possible
use RAM since you wouldn't be using it for
the title any way but I wouldn't bet on it.
For one thing the pfcolors table(s) seem to
come in 44 byte chunks and you'ld be pressed to
find that much RAM.

The simplest thing would probably be to
create a few pfcolors statements with
different colors and choose one at random
with on gosub or some such.


edit
And roughly speaking e is a constant
with the value $DA which is the address
of the variable.
When you put it in the color statement
it get's interpreted as a color.

Edited September 9, 2014 by bogax

[FudgeFiddle]

Oh ok. Thanks. I was able to do a similar color flash with sprites so I wasn't understanding why it wasn't working with this. I'll probably just use 2 pfcolor statements then.

[bogax]

Oh ok. Thanks. I was able to do a similar color flash with sprites so I wasn't understanding why it wasn't working with this. I'll probably just use 2 pfcolor statements then.

 

 

 

I think the bB sets aside space for four whether you

you use it or not (in groups of four eg if you have five then

it uses space for eight)

Might as well use four if you want