Laser Harp

#include <MIDI.h>
MIDI_CREATE_DEFAULT_INSTANCE();

//Photoresistor connection pin
int LDR1 = A0;
int LDR2 = A1;
int LDR3 = A2;
int LDR4 = A3;
int LDR5 = A4;

//Tone selection
int NOTA1 = 72;
int NOTA2 = 74;
int NOTA3 = 76;
int NOTA4 = 79;
int NOTA5 = 81;

void setup() {
  Serial.begin(9600);
  
  MIDI.begin(MIDI_CHANNEL_OFF);
    
  pinMode(LDR1, INPUT);
  pinMode(LDR2, INPUT);
  pinMode(LDR3, INPUT);
  pinMode(LDR4, INPUT);
  pinMode(LDR5, INPUT);
}

void loop() {
  int SLDR1 = analogRead(LDR1);
  int SLDR2 = analogRead(LDR2);
  int SLDR3 = analogRead(LDR3);
  int SLDR4 = analogRead(LDR4);
  int SLDR5 = analogRead(LDR5);


   if (SLDR1 <= 400){//if the photoresistor detects less light it plays a note
    MIDI.sendNoteOn(NOTA1,120,1);
   }
   else{//if the photoresistor detects more light it stops the note
    MIDI.sendNoteOff(NOTA1,0,1);
   }

   if (SLDR2 <= 400){
    MIDI.sendNoteOn(NOTA2,120,1);
   }
   else{
    MIDI.sendNoteOff(NOTA2,0,1);
   }
      if (SLDR3 <= 400){
    MIDI.sendNoteOn(NOTA3,120,1);
   }
   else{
    MIDI.sendNoteOff(NOTA3,0,1);
   }

   if (SLDR4 <= 400){
    MIDI.sendNoteOn(NOTA4,120,1);
   }
   else{
    MIDI.sendNoteOff(NOTA4,0,1);
   }
      if (SLDR5 <= 400){
    MIDI.sendNoteOn(NOTA5,120,1);
   }
   else{
    MIDI.sendNoteOff(NOTA5,0,1);
   }
}