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Wreath I programmed using a Siemens S7-200. I cut a string of lights into 10 sections of 24 volts each to run off the DC power supply & the PLC's DC outputs. The outputs are controlled by a counter that counts up to 87 based on a timer set at 0.42 second pulses. Thsi entire project was completed in less than 2 days after I thought it up, although I have tweaked the program since the video was taken.