overflow

I recently entered a small programming competition in which one had to write a simulated firework show in 3 days.
This is my entry: (here) (run NewEve.exe), it's more or less a minute long.

I thought it might be of interest in this forum, i also thought i could get some nice feedback on the fireworks (what should i change, or what i did right).

Btw, Happy New Year to all!

Hello fellow pyrotechnicians!

I'm trying to build a smoke production device, for magicians, which:
-should produce small quantities of smoke (the color is not important)
-must ignite rapidly and easily (sparks or electrical ignition)
-must burn rapidly (1,2 seconds of smoke)

while:
-being small enough to hide in a hand (or at max in a sleeve)
-being safe enough to be kept and used in hand (or hidden in the sleeve)
-being reasonably non-toxic (it will be used indoors!)
-the mixture has to burn reasonably cold (no one want's to burn himself or take fire during a show )

I was thinking of a small (~1cm diameter, ~3cm long) paper tube, half full with composition and then layered with baffles to prevent the flame from exiting, but i have a few doubts on how to ignite it and on what type of composition to use, considering it will be burnt indoors.

Plus i don't know if the baffles will actually be able to prevent the flame from exiting.

Suggestions?

I had the idea to oxidize a lock, for decorative purposes (-> change its color), but i don't know from where to start.

AFAIK locks are made of brass and steel, so i'd guess i'd need different oxidizers.

I tried a sodium hypochlorite solution (bleach) for some minutes, but it didn't seem to do anything at all.
I have some potassium nitrate, so i might try a solution of that too.

Does anybody know something more on the subject? (time of the reaction, which oxidizer...)

Also called "birthday candle sparklers" or "smokeless-fountain": basically a (relatively) non-toxic fountain that burns on top of the cake during celebrations.

Do you know any good formulas?

(this is what i found on the topic:)
http://www.pyrosocie...?showtopic=1577
http://www.candle4le...-18.pr.1346.htm
http://www.theatrefx...funfacts76.html

I've bought a 6 shell mortar (Pirastan), 1 [16 shots] cake(Billy) and 12 [20 shots] roman candles (which i plan to fuse up in some nice way), all from Alessi, a respected brand .
I will also shoot a few homemade rockets, fountains, hummers and tourbillions...

I hope my friends will also contribute with something!

What will YOU shoot?