week11霹靂燈

int led;

void setup() {              
  // initialize the digital pin as an output.
for(led=10;led<14;led++)
{
  pinMode(led, OUTPUT);  
 digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(100);               // wait for a second
  digitalWrite(led, LOW);   // turn the LED off by making the voltage LOW
if(led==13)
{
  for(led=13;led>=10;led--)
{
 digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(100);               // wait for a second
  digitalWrite(led, LOW);   // turn the LED off by making the voltage LOW
}
}
}
}

// the loop routine runs over and over again forever:
void loop() {
 }