include MIDI.h>
MIDI_CREATE_DEFAULT_INSTANCE();
byte anodes[5] = {30, 32, 34, 36,38};
byte cathodes[5] = {31, 33, 35, 37,39};
byte data1 = 0;

void setPinTo5V(byte pin) //set a pin given to this function to a 5V voltage source
{
pinMode(pin, OUTPUT);
digitalWrite(pin, HIGH);
}

void setPinToGND(byte pin) //set a pin given to this function to a GROUND (GND pin)
{
pinMode(pin, OUTPUT);
digitalWrite(pin, LOW);
}

void loop() {
MIDI.read();
}

void MyHandleNoteOn(byte channel, byte pitch, byte velocity)
{
data1 = MIDI.getData1();
if (data1==48){//C3
setPinTo5V(anodes[0]);//set pin 30 to 5V
setPinToGND(cathodes[0]);//set pin 31 to GND
delay(1); //do nothing for 1 ms
}