Randomlight

int led[18] = { 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39};
int i;
void setup() {
}
void loop() {
analogWrite(led[i], 0);
i = random(18);
analogWrite(led[i], 255);
delay(50);
}

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