void setup() {
// put your setup code here, to run once:
for(int j=2; j<=19; j++) {
pinMode(j, OUTPUT);
}
randomSeed(analogRead(A0));
}
void loop() {
// put your main code here, to run repeatedly:
int iStart = random(1,10);
int iStop = random(11,20);
for (int i=iStart; i<=iStop; i++) {
digitalWrite(i, HIGH);
delay(50);
digitalWrite(i, LOW);
delay(50);
}
delay(200);
}