The circuit typically consists of a capacitor, a resistor, a diode, and a relay or other switching device. The capacitor charges and discharges through the resistor, creating a fluctuating voltage. The diode is used to control the direction of current flow. The relay is triggered by the changing voltage to make the connected light or other load flash on and off.
It's important to note that working with 220 volts requires proper safety precautions and should be done by those with appropriate electrical knowledge and skills.
Please be aware that specific circuit designs may vary depending on the exact requirements and components used.