Add oil. For God's sake add oil before you blow the damm thing up!
dirty sensor
Low oil pressure. Can be a defective oil pump or the oil pressure sending unit is defective. Start by replacing the oil pressure sending unit.
You don't, get the unit serviced and if required repaired.
To make a buzzer with a light, you can connect a buzzer and an LED in parallel to a power source such as a battery. When the buzzer is activated, the LED will also light up, creating a visual and auditory alarm system. Be sure to use appropriate resistors to ensure the components operate within their recommended parameters.
Low oil or a faulty oil level senser
A buzzer works in an electric circuit by creating vibrations in a diaphragm when an electric current passes through a coil. The vibrations produce sound waves that we hear as a buzzing noise. By controlling the flow of current through the coil, the buzzer can produce different tones or patterns of sound.
Low oil level or weak oil pump.
Your oil level could be low and when you stop the oil goes to the front of the pan starving the oil pump.
Add oil.
Close the door
Find the leak and fix it.
There is no reset for the oil pressure light. If you have sufficient oil pressure it is off, if you have low oil pressure it is on. If it is on, STOP driving the car until you find out why it is on.