int speaker = 7;

void setup() {
  pinMode(speaker, OUTPUT);
}

void loop() {
tone(speaker, 200,1000);
delay(200);
tone(speaker, 400,1000);
delay(200);
tone(speaker, 600,1000);
delay(200);
tone(speaker, 700,1000);
delay(200);
tone(speaker, 800,1000);
delay(200);
tone(speaker, 700,1000);
delay(200);
tone(speaker, 600,1000);
delay(200);
tone(speaker, 400,1000);
delay(200);
}