// ...
def address = InetAddress.getByName("127.0.0.1")
while (true) {
	if (threadCount < MAX_THREADS) {
		Thread.start() {
			// ...
			def socket = new Socket(address, ClientServer.PORT)
			socket.withStreams { input, output -> 
				// client-server code
			}
			// ...
		}
	}
	Thread.currentThread().sleep(100)
}