// blinks an LED every ,.., a second 
const int ledPinRed = 3; 
const int ledPinBlue = 10; 
void setup() 
{
  pinMode(ledPinRed, OUTPUT); 
  pinMode(ledPinBlue, OUTPUT); 

}
void loop() 
{
digitalWrite(ledPinRed, HIGH); 
delay(500); 
digitalWrite(ledPinRed, LOW); 
delay(500); 
digitalWrite(ledPinBlue, HIGH); 
delay(500); 
digitalWrite(ledPinBlue, LOW); 
delay(500);



}