5.4.js

var baseBet = 0.8 * 100     // how many satoshis to bet initially
var target = 5.4	        // target multiplier
var betMultiplier = 1.2  // what to multiply the bet size by when we lose a wager
const MAX_BET = 10000 * 100   // maximum bet amount to stop script at (satoshis)
const MAX_GAMES = 2000        // maximum number of games to play before stopping (set to -1 for unlimited)
const BET_SPEED = 16      // time between bets in (ex 500 = 500ms = 0.5s)
const CLIENT_SEED = "fortuna"

let running = true
try {
    const { server_seed_hash } = await this.newSeedPair()
}catch(e){
    if(e == "Error: EXISTING_SEED_TRIPLE_UNUSED"){
        await this.skip()
        await this.newSeedPair()
    }else{
        this.log(`[ERROR] Failure setting seed (${e})`)
		running = false
    }
}
await this.setClientSeed(CLIENT_SEED)
await this.log(`[INFO] Set client seed to: ${CLIENT_SEED}`)

let lossCount = 0
let gameNum = 0

await this.log(`Starting martingale with a base bet of ${baseBet/100} bits.`)
while (running) {
  let bet = betSize(lossCount)
  if (MAX_GAMES !== -1 && gameNum >= MAX_GAMES) {
    // stop after playing max num of games
    this.log(`Stopped after playing ${MAX_GAMES} games.`)
    running = false
  } else if (bet >= MAX_BET) {
    // stop if bet amount reaches max bet
    this.log(`Stopped due to max bet exceeded (${baseBet/100} bits.`)
    running = false
  } else {
    // make the bet and wait for the result
    const { multiplier } = await this.bet(bet, target)

    if (multiplier < target) { // loss
      lossCount++
	  if(lossCount > 8){
	  	target -= Math.min(1, ((lossCount - 13) * 0.08))
	  }
      this.log(`Lost bet. Multiplying bet size by ${betMultiplier} for new bet size of ${bet/100} bits.`)
    } else { // win
      lossCount = 0
	  target = 5.4
      this.log(`Won bet. Setting bet size to ${baseBet/100} bits.`)
    }
  }
  gameNum++
  await sleep(BET_SPEED)
}

function betSize(lossCount) {
  const bet = baseBet * Math.pow(betMultiplier, lossCount)
  return Math.max(100, Math.round(bet / 100) * 100)
}

function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms))
}