Process of building a series circuit and a parallel circuit with Arduino

1.Series Circuit
1.1)Draw the circuit diagram.

1.2)Build the circuit.

2.Parallel Circuit

2.1)Draw the circuit diagram.

2.2)Build the circuit.

3. Add three switches to the parallel circuit above.

3.1)Draw the circuit diagram.

3.2)Build the circuit.

Two of the switches were built by buttons I found in the Arduino kit. The last one consisted of two coins. As coins are conductors, once these two coins attached to each other, the open circuit became a closed circuit.