
// C++ code
//
int led[5]={10,9,8,7,6} ;
void setup()
{
for(int i=0;i<=4;i++){
pinMode(led[i],OUTPUT);
}
}
void loop()
{
for(int i=0;i<=4;i++){
digitalWrite(led[i],HIGH);
delay(500);
digitalWrite(led[i],LOW);
delay(500);
}
for(int i=3;i>=1;i--){
digitalWrite(led[i],HIGH);
delay(500);
digitalWrite(led[i],LOW);
delay(500);
}
}
Source : Youtube Life Tech