4.8 chance

chance=4.8
multiplier=2
base=0.00000010
nextbet=0.00000010
preroll=20
prebet=0.00000010

function dobet()
 if win then
  nextbet=base
 else
  if currentstreak== -preroll then
   nextbet=base
  end
  if currentstreak < -preroll and (currentstreak%12 == 0) then
   nextbet=previousbet*multiplier
if rolls modulus% N == 0 then resetseed()
   end
  end
 end
end