void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(0, OUTPUT);
  pinMode(1, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
testloop();

}

void testloop(){
  digitalWrite(0, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(200);                      // wait for a second
  digitalWrite(0, LOW);   // turn the LED off by making the voltage LOW
  delay(200);                      // wait for a second
  digitalWrite(1, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(200);                      // wait for a second
  digitalWrite(1, LOW);   // turn the LED off by making the voltage LOW
  delay(200);                      // wait for a second
  digitalWrite(2, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(200);                      // wait for a second
  digitalWrite(2, LOW);   // turn the LED off by making the voltage LOW
  delay(200);                      // wait for a second
  digitalWrite(3, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(200);                      // wait for a second
  digitalWrite(3, LOW);   // turn the LED off by making the voltage LOW
  delay(200);                      // wait for a second
  digitalWrite(4, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(200);                      // wait for a second
  digitalWrite(4, LOW);   // turn the LED off by making the voltage LOW
  delay(200);                      // wait for a second
  digitalWrite(5, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(200);                      // wait for a second
  digitalWrite(5, LOW);   // turn the LED off by making the voltage LOW
  delay(200);                      // wait for a second
  digitalWrite(6, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(200);                      // wait for a second
  digitalWrite(6, LOW);   // turn the LED off by making the voltage LOW
  delay(200);                      // wait for a second
  digitalWrite(7, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(200);                      // wait for a second
  digitalWrite(7, LOW);   // turn the LED off by making the voltage LOW
  delay(200);                      // wait for a second
  digitalWrite(8, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(200);                      // wait for a second
  digitalWrite(8, LOW);   // turn the LED off by making the voltage LOW
  delay(200);                      // wait for a second
  digitalWrite(9, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(200);                      // wait for a second
  digitalWrite(9, LOW);   // turn the LED off by making the voltage LOW
  delay(200);                           // wait for a second
  digitalWrite(10, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(200);                      // wait for a second
  digitalWrite(10, LOW);   // turn the LED off by making the voltage LOW
  delay(200);                      // wait for a second
  digitalWrite(11, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(200);                      // wait for a second
  digitalWrite(11, LOW);   // turn the LED off by making the voltage LOW
  delay(200);                      // wait for a second

}