void setup() {
  // put your setup code here, to run once:
for(int pin = 1; pin <= 48; pin++){
  pinMode(pin, OUTPUT);
}
}

void loop() {
  // put your main code here, to run repeatedly:
seq1();
seq2(); seq2();


}

void seq1(){
for(int a = 48; a >= 1; a--){
  digitalWrite(a, HIGH);
}
  delay(200);
}

void seq2(){
for(int a = 1; a <= 48; a++){
  digitalWrite(a, LOW);
  delay(50);
}
}