holy grail lua

ebe     = balance/50000
b       = ebe
oldbal  = balance
oldt    = balance
old     = balance
f       = true
chance  = 49.5
target  = 500
nextbet = ebe
bethigh = false
resetstats()

function dobet()
if (balance>(oldt+(b*6))) then
    nextbet = previousbet*2
    b       = nextbet
    oldt    = balance
end
if balance<oldt then
    oldt = balance
end
if (balance<=(oldbal-(b*3))) then
    nextbet = previousbet*2
    b       = nextbet
    f       = false
    oldbal  = balance
end
if (balance>oldbal) then
    oldbal = balance
end
if ((balance>=(old+(ebe*10))) or ((balance>=old) and (f==false))) then
    ebe = balance/50000
    nextbet = ebe
    b       = ebe
    f       = true
    oldt    = balance
    oldbal  = balance
    old     = balance
end
if (balance>=target) then
stop()
end
end