This page exists within the Old ArtZone Wiki section of this site. Read the information presented on the linked page to better understand the significance of this fact.
Now, let's look at the bricks and what they are made up of.
In the center of each node is a letter indicating the type of input or output is controlled by the node.
Normally, a C output would be connected to a C input but there is nothing stopping you from connecting a different type of output into the input.
To connect two nodes:
Remember, you can connect one output to multiple inputs, but each input can have only one connection.
To disconnect two nodes, right-click on one of the nodes and choose Disconnect from the menu.