array
int ledArray[] = {2,3,4,5,6,7,8,9};
int delayTime = 50;
void setup() {
//initialise ledArray as outputs
for(int i = 0; i<10; i++)
{
pinMode(ledArray[i], OUTPUT);
}
}
void loop() {
//turn LEDs on from 0-7
for(int i = 0; i <= 7; i++)
{
digitalWrite(ledArray[i], HIGH);
delay(delayTime);
}
//turn LEDs off from 7-0
for(int i = 7; i >= 0; i--)
{
digitalWrite(ledArray[i], LOW);
delay(delayTime*5);
}
}