Would you please be so kind and help me instead?

I want to make a function in dicebot that goes under these conditions:

1) basebet = 4 satoshi, multiplier = 50x, betting low at the start (<1.98)
2) every TWO wins (so if total wins amount is even) betamount = previous betamount + 2 satoshi, betting switches to other side (low/high)
3) if balance reaches 0.02 btc, it stops betting.

I made sth like that:

multiplier=50 <----  Should this be chance? 
nextbet = 0.00000004
bethigh=false
wincount = 0 <------  Counter for the wins.
function dobet()
if win  then
   wincount += 1   --  Bump the wincount(er)
   if (wincount == 2) then
   nextbet = previousbet + 0.00000002 <----  Use the previousbet instead of nextbet
   bethigh = !bethigh         <----   This just switches bethigh
   end
else -- lose
  wincount = 0
end
if balance = 0.02 then
stop()
end
end

but it obviously has many errors and I can't seem to make it right. Any help would be really appreciated!