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digitalWrite(13, HIGH);

delay(1000); // Wait for 1000 millisecond(s)

digitalWrite(10, LOW);

delay(1000); // Wait for 1000 millisecond(s)

digitalWrite(13, HIGH);

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delay(1000); // Wait for 1000 millisecond(s)

digitalWrite(8, LOW);

delay(1000); // Wait for 1000 millisecond(s

digitalWrite(19, HIGH);

delay(1000); // Wait for 1000 millisecond(s)

digitalWrite(4, LOW);

delay(1000); // Wait for 1000 millisecond(s

digitalWrite(3, HIGH);

digitalWrite(11, LOW);

delay(1000); // Wait for 1000 millisecond(s)

delay(1000); // Wait for 1000 millisecond(s)

digitalWrite(16, HIGH);

delay(1000); // Wait for 1000 millisecond(s)

digitalWrite(15, LOW);

delay(1000); // Wait for 1000 millisecond(s)

digitalWrite(17, HIGH);

delay(1000); // Wait for 1000 millisecond(s)

digitalWrite(20, LOW);

delay(1000); // Wait for 1000 millisecond(s