I have two sources. I set up a queue to serve as the control center. The leftsource cannot be detected by the control center, so the only result is a red box.
Figure 1 is the placement of my entire machine. Pictures 2 and 3 are what I set up. I hope leftsource can produce blue boxes and rightsource can produce red boxes.
Figure 4 is the control center I set. Please tell me if there is any problem