Simple Alarm for Beginners in Electronics

It's just an alarm for beginners on electronics to practice. Whenever given power supply it will generate sound according as the frequency for which it is designed. The frequency depends on the capacitor values and the resistance.

Resistance
Capacitance
Piezo speakers
Op-Amp uA741
Breadboard
Some wire
9v Batteries

Just connect all the parts as shown in the circuit...

Just connect your batteries and speaker and it will start to generate sound. Thank you