Flashing light making circuit diagram

The circuit working principle of the device is shown in the figure. Plug in the power plug CT. Since the normally closed contact j1 of the relay J is closed, the lamp H lights up. And since the normally open contact j2 is open, the ④ pin of LSE outputs a low level. At this time, the transistor VT conducts Pass. After VT is turned on, relay J is excited and closed, contact j1 is opened, H goes out, and contact j2 is closed at the same time, so the output of LSE pin 4 is high level at this time, transistor VT is cut off, relay J is released, and contact j1 It closes again, H lights up, and contact j2 opens again... This cycle works over and over again, causing the light H to flash.