Arduino mouse mover to keep PC awake

keep_alive_with_led_reset_blink.ino

#include <Mouse.h>

void blinkIfYoureRebooted() {
  // 200, 400, 600, 800, 1000ms blinks
  for(int i=1; i<=5; i++) {
    digitalWrite(LED_BUILTIN, HIGH);
    delay(200 * i);
    digitalWrite(LED_BUILTIN, LOW);
    delay(200 * i);
  }
}

void setup() {
  // this runs once  
  pinMode(LED_BUILTIN, OUTPUT);
  blinkIfYoureRebooted();
  // Mouse movement works with any ATmega32U4 device
  Mouse.begin();
}

void loop() {
  // 10090 is a completely arbitrary number but
  // it seems to move a barely perceptible amount
  // a few times per second at most.
  if(random(0,10090)==0) {
    Mouse.move(random(0,5)-2, random(0,5)-2,0);
  }
}