View difference between Paste ID: DvgkM9Ab and ajWPN1vt

 /*
            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
-                   Version 2, December 2004
+                 Version 2.71828, December 2014
 
 Copyright (C) 2014 me <vomitme @g mail>
 
 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.
 
            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
  0. You just DO WHAT THE FUCK YOU WANT TO.
 */
 
 #include <digitalIOPerformance.h>
 
 #define PIN_PDIODE A0
 #define PIN_BUTTON 2
 #define BUTTON_PRESSED LOW
 
 void setup()
 {
   Mouse.begin();
   Serial.begin(9600); //somehow it can act as a mouse and a serial thing simultaneously
   pinModeFast(PIN_PDIODE, INPUT);
   pinModeFast(PIN_BUTTON, INPUT);
 }
 
 void loop()
 {
   while (digitalReadFast(PIN_BUTTON) == BUTTON_PRESSED) {
     unsigned long i = 0, s, n;
 
     while (digitalReadFast(PIN_PDIODE) != LOW) {
       Serial.print(analogRead(PIN_PDIODE));
       Serial.println("starting position too bright :P");
     }
 
     //shake mouse before the twitchnot necessary
     for (i = 0; i < 12; i++) {
       Mouse.move(0,1,0);
       delayMicroseconds(2000);
       Mouse.move(0,-1,0);
       delayMicroseconds(2000);
     }
 
     //twitch
     i = 0;
     Mouse.move(0,-100,0);
 
     //measure time until screen change detected
     s = micros(); //~3us
     while (digitalReadFast(PIN_PDIODE) != HIGH) i++; //~0.6us per cycle when using digitalReadFast
     n = micros(); //~3us
 
     //print results
     //Serial.print("time (us):\t");
     Serial.println(n - s);
     //Serial.print("\tcycles:\t");
     //Serial.println(i);
 
     delay(10);
     Mouse.move(0,100,0);
     delay(random(14,62));
     //delay(100); //uncomment this if vsync
   }
 }