Arduino LED Chase I

chase1.cc

const int number = 11;
const byte order [number] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
void setup() {                
  for (byte i = 0; i < number; i++)  
    pinMode(order [i], OUTPUT);
}  
void repeat (const unsigned long delaytime)
  {
  for (byte i = 0; i < number; i++)
    {
    byte pin = order [i];
    digitalWrite(pin, HIGH);
    delay(delaytime);              
    digitalWrite(pin, LOW);
    } 
  } 
 void loop() 
  {
  for (unsigned long n = 500; n > 0; n -= 100)
    repeat (n);
  }