int pinLed[] ={0,1,2,3,4,5,6,7};
int i,j;
void batphaitrai()
{
  for (i=7;i>=0;i--) {
  digitalWrite(pinLed[i],LOW);
  delay(300);
}
}
void tatphaitrai(){
  static int chay4 = 0;
 for (chay4 = 7;chay4>=0;chay4--)
 {
  digitalWrite(pinLed[chay4], HIGH);
  delay(300);
 }
}
 void setup()
 {
  pinMode(pinLed[i], OUTPUT);
 }
 void loop()
 {
  batphaitrai();
  tatphaitrai();
 }