pins 4,5,6 -3 x leds - 3 x 220r resistors - 1 x ground
pins 7,8 - 2 x leds - 2 x 220r - 1 x ground
pin 2 - switch - 5v
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10k resistor - ground
this is my wiring
the grounds are different but should i use the one at the end of the line of digital i/o pins on the uno?