bool A = true;
bool B = false;
bool C = false;
bool D = false;

void setup() {
  // put your setup code here, to run once:
  pinMode(22, OUTPUT);
  pinMode(23, OUTPUT);
  pinMode(24, OUTPUT);
  pinMode(25, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  sps();
  if(A = true) {
  
  }
  if(A = true) {
  
  }
  if(A = true) {
  
  }
  if(A = true) {
  
  }
}

void sps() {
 A = true;
 delay(10);
 A = false;
 delay(10);
 B = true;
 delay(10);
 B = false;
 delay(10);
 C = true;
 delay(10);
 C = false;
 delay(10);
 D = true;
 delay(10);
 D = false;
 delay(10);
}