Whether the pipeline color function can be added, the player can choose whether to enable this function.
Like red in and green out. In this way, it can be seen that the pipe is the main liquid (gas) pipe, and that one is the main outlet pipe
When playing the PY module, because there are too many gases and liquids, the whole map is basically a pipeline. If you don't pay attention to that one is the output main pipe and the other one is the main inlet pipe, it is easy to connect the wrong one.
For example, the factory produces excess oxygen, which needs to be connected to the input manifold, so that the oxygen can be buffered and redistributed to the output through the input manifold. Because the pipes are all of the same color, it is easy to connect the oxygen that should have been returned to the storage tank to the main oxygen output pipe, which led to the failure of the factory to discharge oxygen and shut down the factory.