/*
 
 LED Pulse

 Read a value from a pulse sensor and write that value to an LED.
 
*/

int pulse = 7;         // pulse input pin
int led = 8;           // LED output pin
int mode;

void setup()  { 
  pinMode(led, OUTPUT);
  pinMode(pulse, INPUT);
} 

// the loop routine runs over and over again forever:
void loop()  {
 mode = digitalRead(pulse); 
 if (mode == HIGH) { 
    // Fake a heartbeat
    analogWrite(led, 1023); 
    delay(400);
    analogWrite(led, 0);
    delay(600);
    analogWrite(led, 75);
    delay(200);
    analogWrite(led, 0);
    delay(200);
  }
  else {
    digitalWrite(led, HIGH);
  }
}