Start with Association A. Use the buttons to select any combination of an INPUT pattern and a DESIRED OUTPUT pattern. Call the combination "Association A" and write it down. Click the button to set the THRESHOLDS to 0, and type in a LEARNING RATE of .05.
Set RANDOM CONNECTION WEIGHTS by clicking the button. Propagate the activation. You probably will not get the desired output. If not, adjust the weights and propagate again. Then repeat by pressing "Cycle" over and over again. Notice that the error decreases with each cycle. Keep cyling until the desired output is obtained. Then cycle just one more time for good measure.
Scroll down to Association B, and follow the same process.
Then scroll down to Association A and B. First click on the button marked "Add Weights A and B". Then set the THRESHOLDS and the LEARNING RATE as before. But now, select the INPUT and DESIRED OUTPUT for "Association A". Propagate the activation. You may or may not get the desired output on the first try. It could depend on what the initial random weights were, which two associations you chose, and on how "thoroughly" the associations were learned. Now, change the INPUT and DESIRED OUTPUT to "Association B". Without changing the weights, propagate the activation again. Again, whether or not you get the correct output depends on the factors described above. If you do not get the right output, you can try going back and "learning" one or both associations more "thoroughly" by cycling more times, and adding the new connection weights. Once both associations are thoroughly learned and the connection weights are combined, the single set of new weights will give you either association correctly. You can also try a different pair of associations because some are "easier" to learn than others.