int AP = 11;
int AM = 10;

int BP = 9;
int BM = 8;

int gz = 2;
int gs = 3;
int gp = 4;

void setup() {
  // put your setup code here, to run once:

  pinMode(gz, INPUT);
  pinMode(gs, INPUT);
  pinMode(gp, INPUT);

  pinMode(AP, OUTPUT);
  pinMode(AM, OUTPUT);

  pinMode(BP, OUTPUT);
  pinMode(BM, OUTPUT);

  Serial.begin(9600);

}

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

  if(digitalRead(gz) == HIGH)
    {
      for(int x=0;x<25;x++)
          digitalWrite(BM, HIGH);
          digitalWrite(BP, HIGH);
          digitalWrite(AP, LOW);
          digitalWrite(AM, LOW);

          delay(10);

          digitalWrite(BM, LOW);
          digitalWrite(BP, LOW);
          digitalWrite(AP, HIGH);
          digitalWrite(AM, HIGH);

          delay(10);
    }
}