I keep getting stray '/302'. [duplicate]

Question

I even rewrote the code and it still didn't work. How can I fix this?

#include "pitches.h"
void setup() {
    // put your setup code here, to run once:
    pinMode(4, OUTPUT);
}

void loop() {
    // put your main code here, to run repeatedly:
  tone(4, NOTE_D4, 500);
  digitalWrite(dayOne, HIGH);
  digitalWrite(Shamash, HIGH);
  delay(700);
  tone(4, NOTE_A4, 250);
  digitalWrite(dayOne, LOW);
  digitalWrite(Shamash, LOW);
  delay(350);
  tone(4, NOTE_A4, 250);
  delay(350);
  digitalWrite(dayOne, HIGH);
  digitalWrite(dayTwo, HIGH);
  digitalWrite(Shamash, HIGH);
  tone(4, NOTE_A4, 250);
  delay(350);
  tone(4, NOTE_A4, 250);
  delay(350);
  digitalWrite(dayOne, LOW);
  digitalWrite(dayTwo, LOW);
  digitalWrite(Shamash, LOW);
  tone(4, NOTE_D5, 500);
  delay(700);
  tone(4, NOTE_A4, 250);
  digitalWrite(dayOne, HIGH);
  digitalWrite(dayTwo, HIGH);
  digitalWrite(dayThree, HIGH);
  digitalWrite(Shamash, HIGH);
  delay(350);
  tone(4, NOTE_A4, 250);
  delay (350);
  tone(4, NOTE_A4, 500);
  digitalWrite(dayOne, LOW);
  digitalWrite(dayTwo, LOW);
  digitalWrite(dayThree, LOW);
  digitalWrite(Shamash, LOW);
  delay (700);
  tone(4, NOTE_G4, 250);
  digitalWrite(dayOne, HIGH);
  digitalWrite(dayTwo, HIGH);
  digitalWrite(dayThree, HIGH);
  digitalWrite(dayFour, HIGH);
  digitalWrite(Shamash, HIGH);
  delay (350);
  tone(4, NOTE_F4, 250);
  delay (350);
  tone(4, NOTE_G4, 500);
  digitalWrite(dayOne, LOW);
  digitalWrite(dayTwo, LOW);
  digitalWrite(dayThree, LOW);
  digitalWrite(dayFour, LOW);
  digitalWrite(Shamash, LOW);
  delay (700);
  tone(4, NOTE_F4, 250); //Oh chanukah oh chanuka come light the meora
  digitalWrite(dayOne, HIGH);
  digitalWrite(dayTwo, HIGH);
  digitalWrite(dayThree, HIGH);
  digitalWrite(dayFour, HIGH);
  digitalWrite(dayFive, HIGH);
  digitalWrite(Shamash, HIGH);
  delay (350);
  tone(4, NOTE_F4, 250); //Oh chanukah oh chanuka come light the meora
  delay (350);
  tone(4, NOTE_A4, 500);
  digitalWrite(dayOne, LOW);
  digitalWrite(dayTwo, LOW);
  digitalWrite(dayThree, LOW);
  digitalWrite(dayFour, LOW);
  digitalWrite(dayFive, LOW);
  digitalWrite(Shamash, LOW);
  delay(700);
  tone(4, NOTE_A4, 250);
  digitalWrite(dayOne, HIGH);
  digitalWrite(dayTwo, HIGH);
  digitalWrite(dayThree, HIGH);
  digitalWrite(dayFour, HIGH);
  digitalWrite(dayFive, HIGH);
  digitalWrite(daySix, HIGH);
  digitalWrite(Shamash, HIGH);
  delay(350);
  tone(4, NOTE_A4, 250);
  delay(350);
  tone(4, NOTE_D5, 500);
  digitalWrite(dayOne, LOW);
  digitalWrite(dayTwo, LOW);
  digitalWrite(dayThree, LOW);
  digitalWrite(dayFour, LOW);
  digitalWrite(dayFive, LOW);
  digitalWrite(daySix, LOW);
  digitalWrite(Shamash, LOW);
  delay(700);
  tone(4, NOTE_A4, 250);
  digitalWrite(dayOne, HIGH);
  digitalWrite(dayTwo, HIGH);
  digitalWrite(dayThree, HIGH);
  digitalWrite(dayFour, HIGH);
  digitalWrite(dayFive, HIGH);
  digitalWrite(daySix, HIGH);
  digitalWrite(daySeven, HIGH);
  digitalWrite(Shamash, HIGH);
  delay(350);
  tone(4, NOTE_A4, 250);
  delay (350);
  tone(4, NOTE_A4, 500);
  digitalWrite(dayOne, LOW);
  digitalWrite(dayTwo, LOW);
  digitalWrite(dayThree, LOW);
  digitalWrite(dayFour, LOW);
  digitalWrite(dayFive, LOW);
  digitalWrite(daySix, LOW);
  digitalWrite(daySeven, LOW);
  digitalWrite(Shamash, LOW);
  delay (700);
  tone(4, NOTE_G4, 250);
  digitalWrite(dayOne, HIGH);
  digitalWrite(dayTwo, HIGH);
  digitalWrite(dayThree, HIGH);
  digitalWrite(dayFour, HIGH);
  digitalWrite(dayFive, HIGH);
  digitalWrite(daySix, HIGH);
  digitalWrite(daySeven, HIGH);
  digitalWrite(dayEight, HIGH);
  digitalWrite(Shamash, HIGH);
  delay (350);
  tone(4, NOTE_F4, 250);
  delay (350);
  tone(4, NOTE_G4, 500);
  digitalWrite(dayOne, LOW);
  digitalWrite(dayTwo, LOW);
  digitalWrite(dayThree, LOW);
  digitalWrite(dayFour, LOW);
  digitalWrite(dayFive, LOW);
  digitalWrite(daySix, LOW);
  digitalWrite(daySeven, LOW);
  digitalWrite(dayEight, LOW);
  digitalWrite(Shamash, LOW);
  delay (700);
  tone(4, NOTE_F4, 500); //Oh chanukah oh chanuka come light the meora
  delay (700);


  tone(4, NOTE_F4, 250);
  digitalWrite(dayOne, HIGH);
  delay (50);
  tone(4, NOTE_F4, 250);
  digitalWrite(dayTwo, HIGH);
  delay (50);
  tone(4, NOTE_F4, 250);
  digitalWrite(dayThree, HIGH);
  delay (50);
  tone(4, NOTE_F4, 250);
  digitalWrite(dayFour, HIGH);
  delay (50);
  tone(4, NOTE_F4, 250);
  digitalWrite(Shamash, HIGH);
  delay (50);
  tone(4, NOTE_F4, 250);
  digitalWrite(dayFive, HIGH);
  delay (50);
  tone(4, NOTE_F4, 250);
  digitalWrite(daySix, HIGH);
  delay (50);


  tone(4, NOTE_G4, 250);
  digitalWrite(daySEVEN, HIGH);
  delay (50);
  tone(4, NOTE_G4, 250);
  digitalWrite(dayEIGHT, HIGH);
  delay (50);
  tone(4, NOTE_G4, 250);
  delay(250);

  tone(4, NOTE_A4, 250);
  digitalWrite(dayEight, HIGH);
  delay (50);
  tone(4, NOTE_A4, 250);
  digitalWrite(daySeven, HIGH);
  delay (50);
  tone(4, NOTE_A4, 250);
  digitalWrite(daySix, HIGH);
  delay (50);
  tone(4, NOTE_A4, 250);
  digitalWrite(dayFive, HIGH);
  delay (50);
  tone(4, NOTE_A4, 250);
  digitalWrite(Shamash, HIGH);
  delay (50);
  tone(4, NOTE_A4, 250);
  digitalWrite(dayFour, HIGH);
  delay (50);
  tone(4, NOTE_A4, 250);
  digitalWrite(dayThree, HIGH);
  delay (50);

  tone(4, NOTE_G4, 250);
  digitalWrite(dayTwo, HIGH);
  delay(50);
  tone(4, NOTE_G4, 250);
  digitalWrite(dayOne, HIGH);
  delay(50);
  tone(4, NOTE_G4, 250);
  delay(250);

  delay (300);
  tone(4, NOTE_F4, 500);
  delay (700);
  tone(4, NOTE_F4, 250);
  delay (350);
  tone(4, NOTE_F4, 250);
  delay (350);
  tone(4, NOTE_G4, 500);
  delay (700);
  tone(4, NOTE_F4, 250);
  delay (350);
  tone(4, NOTE_E4, 250);
  delay (350);
  tone(4, NOTE_F4, 750);
  delay (1000);

  tone(4, NOTE_F4, 250);
  delay (350);
  tone(4, NOTE_G4, 250);
  delay (350);
  tone(4, NOTE_A4, 250);
  delay (350);
  tone(4, NOTE_G4, 250);
  delay (350);
  tone(4, NOTE_F4, 500);
  delay (700);
  tone(4, NOTE_F4, 500);
  delay (700);
  tone(4, NOTE_G4, 500);
  delay (700);
  tone(4, NOTE_F4, 250);
  delay (350);
  tone(4, NOTE_E4, 250);
  delay (350);
  tone(4, NOTE_D4, 500);
  delay (700);
  delay (2000);
}

Answer 1

The Stray /302 is saying that the compiler found some random unicode character that it didn't understand. You should put your code into some text editor that will allow you to see the unicode characters and go find it. It will probably be a lot easier if you'll format that code instead of trying to cram it all in one line.