To start with:
Enter 0 in LEFT DETECTOR box, that will set it at zero degree, and 120 in the RIGHT DETECTOR box to set it at 120 degrees.
Enter 24 in EMITTER of ENTANGLED PAIRS, that will throw 24 entangled pairs.
Click "Cyber Experiment illustrating Quantum Probabilities" button, and "Pair of entangled twins" button.
Finally click "Launch this Entangled Pairs Cyber Experiment" button.
For down to earth explanations, click and consult any of the top 4 blue colored items.