Help with stray \342 error

I'm trying to get the hang of C/C++ since I've never used this language before. Any insight into why I'm getting an error would be greatly appreciated.

void setup() {
Serial.begin (38400);

}

void loop() {
 int time1;
 int time2;
 int timestamp;
 time1= millis ();
 Serial.println ("⠰⡿⠿⠛⠛⠻⠿⣷");
⠀ Serial.println ("    ⣀⣄⡀⠀⠀⠀⠀⢀⣀⣀⣤⣄⣀⡀");
⠀ Serial.println ("⠀⠀⠀⢸⣿⣿⣷⠀⠀⠀⠀⠛⠛⣿⣿⣿⡛⠿⠷");
⠀ Serial.println ("⠀⠀ ⠘⠿⠿⠋⠀⠀⠀⠀⠀⠀⣿⣿⣿⠇");
 Serial.println ("⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀    ⠈⠉⠁");
 Serial.println ("");
⠀ Serial.println ⠀("⠀    ⣿⣷⣄⠀⢶⣶⣷⣶⣶⣤⣀");
⠀ Serial.println ⠀("     ⣿⣿⣿⠀⠀⠀⠀⠀⠈⠙⠻⠗"):
⠀ Serial.println ⠀("   ⣰⣿⣿⣿⠀⠀⠀⠀⢀⣀⣠⣤⣴⣶⡄");
 Serial.println   ("⣠⣾⣿⣿⣿⣥⣶⣶⣿⣿⣿⣿⣿⠿⠿⠛⠃");
 Serial.println (" ⢰⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡄");
Serial.println ("  ⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡁");
Serial.println ("  ⠈⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠁");
⠀⠀ Serial.println ("  ⠛⢿⣿⣿⣿⣿⣿⣿⡿⠟ ");
⠀⠀⠀⠀ Serial.println (" ⠀⠉⠉⠉"); 
 time2 = millis ();
 timestamp = time2 - time1;
 Serial.print ("The time taken to print is:  ");
 Serial.print (timestamp);
 Serial.println (" milliseconds");

 delay (2500); //delayed by 2.5 seconds, this is in milliseconds. 
}

Did you copy past the code from somewhere? Check you double quotation marks. Are they the ‘straight’ type or angled ? Copy the code you just posted here and paste back in the IDE. Do you still have the error?

There are blank Braille characters outside the quotes. They are hard to spot and the forum software does not change them (unlike those wrong type quotes).

Fixed version:

void setup() {
  Serial.begin (38400);
}

void loop() {
  int time1;
  int time2;
  int timestamp;
  time1= millis ();
  Serial.println ("⠰⡿⠿⠛⠛⠻⠿⣷");
  Serial.println ("    ⣀⣄⡀⠀⠀⠀⠀⢀⣀⣀⣤⣄⣀⡀");
  Serial.println ("⠀⠀⠀⢸⣿⣿⣷⠀⠀⠀⠀⠛⠛⣿⣿⣿⡛⠿⠷");
  Serial.println ("⠀⠀ ⠘⠿⠿⠋⠀⠀⠀⠀⠀⠀⣿⣿⣿⠇");
  Serial.println ("⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀    ⠈⠉⠁");
  Serial.println ("");
  Serial.println ("⠀    ⣿⣷⣄⠀⢶⣶⣷⣶⣶⣤⣀");
  Serial.println ("     ⣿⣿⣿⠀⠀⠀⠀⠀⠈⠙⠻⠗");
  Serial.println ("   ⣰⣿⣿⣿⠀⠀⠀⠀⢀⣀⣠⣤⣴⣶⡄");
  Serial.println ("⣠⣾⣿⣿⣿⣥⣶⣶⣿⣿⣿⣿⣿⠿⠿⠛⠃");
  Serial.println (" ⢰⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡄");
  Serial.println ("  ⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡁");
  Serial.println ("  ⠈⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠁");
  Serial.println ("  ⠛⢿⣿⣿⣿⣿⣿⣿⡿⠟ ");
  Serial.println (" ⠀⠉⠉⠉"); 
  time2 = millis ();
  timestamp = time2 - time1;
  Serial.print ("The time taken to print is:  ");
  Serial.print (timestamp);
  Serial.println (" milliseconds");

  delay (2500); //delayed by 2.5 seconds, this is in milliseconds. 
}