Multiple sets of colorful light chain circuits that flash in cycles (Part 2)

It uses thyristor control and the actuator is a relay, so it can drive a very powerful
lantern chain. When the power is turned on, one thyristor is always turned on first, so the three groups of relays KAa-KA3 take turns to engage and release,
controlling the lighting and extinguishing of the three groups of colored lights . The lighting time is determined by Rz, R4, wind and Cl-C3.