Arduino, H Bridge, electromagnetic actuator

int pin1 = 6;
int pin2 = 9;
int d = 500;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(pin1, OUTPUT);
  pinMode(pin2, OUTPUT);
}
void loop() {
 //  put your main code here, to run repeatedly:
  digitalWrite(pin1, HIGH);
  digitalWrite(pin2, LOW);
  delay(d);
  digitalWrite(pin1, LOW);
  digitalWrite(pin2, HIGH);
  delay(d);
}