import cirq

def main():
    # Pick a qubit.
    qubit = cirq.GridQubit(0, 0)

    # Create a circuit
    circuit = cirq.Circuit.from_ops(
        cirq.X(qubit)**0.5,  # Square root of NOT.
        cirq.measure(qubit, key='m')  # Measurement.
    )
    print("Circuit:")
    print(circuit)

    # Simulate the circuit several times.
    simulator = cirq.Simulator()
    result = simulator.run(circuit, repetitions=20)
    print("Results:")
    print(result)

if __name__ == "__main__":
    main()