Matrix user forums

Thank you Steve. I am struggling with the carpark. I cannot understand the purpose of inputs 2 and 3. I have made the barrier go up in response to input 1, and solved the count through 4 and 5, but I would like the barrier to go down automatically. I also have no idea how to program the wait signal ...

Does anyone know of a book which supplies answers to the mimics. This used to be available in Flowol and it would help me as a non-programmer.