Slip line varistor shooting circuit

Circuit Description: This circuit can be used in shooting type games. IC2a and IC2b form an unsteady multivibrator clock IC1, IC1 makes LED1-8 emit light, LED5 is the target LED, the purpose of this game is to reduce the index similar to LED5. After this step is done, the entire display will be blank for a few seconds, indicating that it is under attack. Otherwise, the lit LED remains lit.