#include <MIDI.h>

#define LED 13
#define BUTTON 7

int val = 0;

void setup() {
  pinMode(LED, OUTPUT);
  pinMode(BUTTON, INPUT);
  
  MIDI.begin(); 
}

void loop() {
  val = digitalRead(BUTTON);
  
  if (val == HIGH) {
    digitalWrite(LED, HIGH);
    MIDI.sendNoteOn(36,127,1);  // Send a Note (pitch 36, velo 127 on channel 1)
    delay(300);		       
  
    digitalWrite(LED, LOW);
    MIDI.sendNoteOff(36,0,1);   // Stop the note
    delay(300);
  
    digitalWrite(LED, HIGH);
    MIDI.sendNoteOn(38,127,1);  // Send a Note (pitch 36, velo 127 on channel 1)
    delay(300);		       
  
    digitalWrite(LED, LOW);
    MIDI.sendNoteOff(38,0,1);   // Stop the note
    delay(300);
  }
}