This quantum circuit prepares a qubit in superposition, measures it, and then applies a conditional X gate to another qubit based on the measurement.
```python
from qiskit import QuantumCircuit
# Create a circuit with 2 qubits and 2 classical bits
qc = QuantumCircuit(2, 2)
# Prepare qubit 0 in superposition
qc.h(0)
# Measure qubit 0 and store the result in classical bit 0
qc.measure(0, 0)
# Apply a conditional X gate on qubit 1 based on the measurement of qubit 0
qc.x(1).c_if(0, 1)
# Measure qubit 1 and store the result in classical bit 1
qc.measure(1, 1)
```'Failed to run program: \'409 Client Error: Conflict for url: https://api.quantum.ibm.com/runtime/jobs. {"errors":[{"message":"You have reached the limit of 3 pending jobs. Please wait for a job to complete or cancel one before submitting anything new.","code":3458,"solution":"Wait until some previous jobs were finished. You can cancel pending jobs to run new jobs.","more_info":"https://docs.quantum-computing.ibm.com/errors"}]}\''