https://media.istockphoto.com/vectors/semaphore-signal-traffictrain-lights-vector-illustration-vector-id1203691789?b=1&k=20&m=1203691789&s=170667a&w=0&h=dgXum1iNsf3Tl5jQrc9mTDqYsFdmUvmGkis8Dlqtky0=