1
int led1 = 13;
2
int led2 = 12;
3
int led3 = 11;
4
int led4 = 10;
5
int led5 = 9;
6
int led6 = 8;
7
int led7 = 7;
8
int led8 = 6;
9
int led9 = 5;
10
int delayTime = 500;
11

12
void setup() {
13
  pinMode(led1, OUTPUT);
14
  pinMode(led2, OUTPUT);
15
  pinMode(led3, OUTPUT);
16
  pinMode(led4, OUTPUT);
17
  pinMode(led5, OUTPUT);
18
  pinMode(led6, OUTPUT);
19
  pinMode(led7, OUTPUT);
20
  pinMode(led8, OUTPUT);
21
  pinMode(led9, OUTPUT);
22
}
23

24
void loop() {
25
  // Sample animation - Blink every row
26

27
  // Row 1
28
  digitalWrite(led1, HIGH);
29
  digitalWrite(led2, HIGH);
30
  digitalWrite(led3, HIGH);
31
  delay(delayTime);
32
  digitalWrite(led1, LOW);
33
  digitalWrite(led2, LOW);
34
  digitalWrite(led3, LOW);
35

36
  // Row 2
37
  digitalWrite(led4, HIGH);
38
  digitalWrite(led5, HIGH);
39
  digitalWrite(led6, HIGH);
40
  delay(delayTime);
41
  digitalWrite(led4, LOW);
42
  digitalWrite(led5, LOW);
43
  digitalWrite(led6, LOW);
44

45
  // Row 3
46
  digitalWrite(led7, HIGH);
47
  digitalWrite(led8, HIGH);
48
  digitalWrite(led9, HIGH);
49
  delay(delayTime);
50
  digitalWrite(led7, LOW);
51
  digitalWrite(led8, LOW);
52
  digitalWrite(led9, LOW);
53
}