### Project 3: Flowing Light

**1.Introduction**

In this project, we use graphical programming to control 3 LED module . Light up and dim them according to given sequence and time, gaining a visual effect of flowing light.

**2.Materials Required**

1. KEYESTUDIO UNO Control Board *1
2. V5 Sensor Shield*1
3. Piranha LED*3
4. Female to Female Dupont Line*9

**3.Connection Diagram**

![](media/image-20251201155409089.png)

![](media/image-20251201155433742.png)

**4.Sample Code**

```c
void setup()
{
  pinMode( 3 , INPUT);
  pinMode( 2 , INPUT);
  pinMode( 4 , INPUT);
  pinMode( 2 , OUTPUT);
  pinMode( 3 , OUTPUT);
  pinMode( 4 , OUTPUT);
}

void loop()
{
  digitalWrite( 2 , !( digitalRead(2) ) );
  delay( 500 );
  digitalWrite( 3 , !( digitalRead(3) ) );
  delay( 500 );
  digitalWrite( 4 , !( digitalRead(4) ) );
  delay( 500 );
}
```

**5.Result**

To realize flowing light function, we should connect three high bright LED module of IO port.