void setup() pinMode(13, OUTPUT);

void loop() digitalWrite(13, HIGH); delay(1000); digitalWrite(13, LOW); delay(1000);

![Mental image: Uno with LED on D13] In Arduino IDE :

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Arduino Uno Library For Proteus |best| May 2026

void setup() pinMode(13, OUTPUT);

void loop() digitalWrite(13, HIGH); delay(1000); digitalWrite(13, LOW); delay(1000); arduino uno library for proteus

![Mental image: Uno with LED on D13] In Arduino IDE : void setup() pinMode(13