^ everything you just posted can still be provably fair by using a nonce value. That way, you can't seek ahead in the number sequence, otherwise the client will know (because their end result was not your result). As for the user picking hi and lo, you could also assign "hi" to black, and "lo" to red. Or, *gasp*, you could let it be at the discretion of the user.

Why are you just insistent on posting relentless garbage? Don't you want your site to be fair to your user base?