Chasing LED light with Pulse Width Modulation (PWM) using a Raspberry Pi and Python 3.4

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Green Chasing LED Light “with tails” in 5 channels by use of PWM for creating dimmed LED’s in tail. Red LED’s are PWM controlled by buttons, and duty cycle level (0-100 percent) is shown by turning on 1-5 green LED’s in 20 percent intervals. Increasing and decreasing of Red LED duty cycle also increases and decreases speed of chasing light.

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can i know the coding? i cannot open the link

masz