KATIRIA & NISA| CODE

byte ledPin[] = {4, 5, 6, 7, 8, 9, 10, 11, 12, 13}; //telling you which pin the LED is plugged into
int ledDelay(65);  //what the delay is between LEDs
int direction = 1; //direction in which the light is jumping between LEDs
int currentLED = 0; //the current LED being processed
unsigned long changeTime; //changing time with a "long" data type

void setup() {  //setup the program 
  for(int x=0; x<10; x++) { //while these conditions are true [starting at x=0 while x is less than ten, add 1]
    pinMode(ledPin[x], OUTPUT);} //tells you if the pin is set as input or output [telling LED to turn on or off]
    
    changeTime = millis(); //change time to milliseconds
}

void loop() {  //tells program to constantly loop
  
  if((millis() - changeTime) > ledDelay) {  //if ((millis() - changeTime) > ledDelay) is true, change the LED and change the time to milliseconds
    changeLED();   //see above
    changeTime = millis();    //see above
  }
}

void changeLED() {    //begin when the "if" statement is true
  for (int x = 0; x<10; x++) {  //while these conditions are true [starting at x=0 while x is less than ten, add 1]
    digitalWrite(ledPin[x], LOW);   //turn the LED in the pin off
  }
  
  digitalWrite(ledPin[currentLED], HIGH); // is telling you to turn in on when the for statement is false
  currentLED += direction;  // Change dirrection  
  if(currentLED == 9) {direction = -1;} // when it reaches the 9 LED dirrecion reverses 
  if (currentLED == 0) {direction = 1;} // when it reaches LED 0 change dirrection foward 
}