// turn leds off from 10-2.
for (int i = 9; i >= 0; i--) // <————<<<<<
{
digitalWrite(ledArray[i], LOW);
delay(delayTime);
}
// turn leds off from 10-2.
for (int i = 9; i >= 0; i--) // <————<<<<<
{
digitalWrite(ledArray[i], LOW);
delay(delayTime);
}