Use KD-1004 to make a four-way watercolor light controller

VDI, VD2, CI, C2 and Rl form a simple capacitor step-down half-wave rectifier and voltage stabilizing circuit. After powering on, it can output
a DC voltage of about 3V for powering the integrated block KD -1004. The trigger end of the integrated block is connected to the positive end of the power supply. After power on, its four
output terminals QI~Q4 output negative pulses in sequence, which are reversely amplified by the external transistors VTI~VT4 and become positive pulses,
triggering the thyristors VS1~ VS4 drives the four-way colored lights in the order of "HI-H2-H3-H4~H3-H2-", with six
steps as a cycle, turning and flashing rhythmically at a rate of about 30 cycles per minute. As long as the four groups of colored lights are properly arranged in the space,
a flowing water effect can be created.