In the prevoius page you have learned about the precausions regarding te circuit.
In this simulation we have use the 4 dip switch as it is not comsulsory you can just use any other switch like sliding, normal, toggle switch in this circuit. In the given circuit you can use first two switches that act as an input. Each IC contains 4 Gate with 2 input and 1 output. the structure of this IC is shown Below. You can see thructure of the IC is shown in the previous page.

while the structure of each gate is shown.
So see the simulation click on start simulation button the use the Switches as input for the IC and and match the output according to the truth table shown in the previous page.
Note: Please note that you will need a stable internet connectionn for this simulation to work properly once it is fully load.