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int led1 = D3;
int led2 = D2;

void setup() {

pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
}

void loop() {
    
// digitalWrite(led1, HIGH);
// delay(3000);
// digitalWrite(led1, LOW);
// delay(3000);

// for( int i = 0; i < 3; i++ )
// 	{
// 	    digitalWrite(led1, HIGH);
//         delay(500);
//         digitalWrite(led1, LOW);
//         delay(500);
// 	}
// delay(3000);

digitalWrite(led1, HIGH);
digitalWrite(led2, LOW);
delay(1000);
digitalWrite(led1, LOW);
digitalWrite(led2, HIGH);
delay(1000);






}
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