In the stomach pulsing like a heart beat. I would like to add that to the full script on pin30

The casing is designed to receive a NeoRing of Adafruit, I still need to get one though... In the meantime we can use a led!

int ledPin = 30;
unsigned int i=0;
boolean rise=true;
int period=1250;

void setup()
{
pinMode(ledPin, OUTPUT);
}

void loop()
{
if(i == period)
{
i=1;
rise= !rise;
}
if(rise == false)
{
digitalWrite(30, LOW);
delayMicroseconds(i);
digitalWrite(30, HIGH);
delayMicroseconds(period-i);
i=i+1;
}

if(rise == true)
{
digitalWrite(30, LOW);
delayMicroseconds(period-i);
digitalWrite(30, HIGH);
delayMicroseconds(i);
i=i+1;
}

}