Arcade and Pir sensor

hello add pir sensor turn off leds suggestions,
 i didn't write code modify , add own
 demo  starting pir sensor newbie

code: [select]

/*
  arrays
  uses arrays turn on multiple lights.
 */
 
//set pins using array
int led[10] = {3, 4, 5, 6, 7, 8, 9, 10, 11, 12};

//setup led pins
void setup() {               
  (int = 0; < 10; i++) {
    pinmode(led[i], output);
  }   
}

//function making lights flash
void flashlights() {
  (int = 0; < 10; i++) {
    digitalwrite(led[i], low);
  }
  (int = 0; < 10; a++) {
    (int = 0; < 10; += 2) {
      digitalwrite(led[i], high);
    }
    delay(500);
    (int = 0; < 10; += 2) {
      digitalwrite(led[i], low);
    }
    (int = 1; < 10; += 2) {
      digitalwrite(led[i], high);
    }
    delay(500);
    (int = 1; < 10; += 2) {
      digitalwrite(led[i], low);
    }
  }
} 

//function making lights 'move'
void movelights() {
  (int = 0; < 10; i++) {
    digitalwrite(led[i], low);
  }
  (int = 0; < 20; a++) {
    (int = 0; < 10; += 3) {
      digitalwrite(led[i], high);
    }
    delay(350);
    (int = 0; < 10; += 3) {
      digitalwrite(led[i], low);
    }
    (int = 1; < 10; += 3) {
      digitalwrite(led[i], high);
    }
    delay(350);
    (int = 1; < 10; += 3) {
      digitalwrite(led[i], low);
    }
    (int = 2; < 10; += 3) {
      digitalwrite(led[i], high);
    }
    delay(350);
    (int = 2; < 10; += 3) {
      digitalwrite(led[i], low);
    }
  }
}

//function making lights count up.
void countlights() {
  (int = 0; < 10; i++) {
    digitalwrite(led[i], low);
  }
  (int = 0; < 10; i++) {
    digitalwrite(led[i], high);
    delay(1000);
  }
  (int = 0; < 35; a++) {
    (int = 0; < 10; i++) {
      digitalwrite(led[i], high);
    }
    delay(40);
    (int = 0; < 10; i++) {
      digitalwrite(led[i], low);
    }
    delay(40);
  }
}

//finally, run program 3 programs!
void loop() {
  countlights();
  movelights();
  flashlights();
}

anyone considering answering should read first:-
http://forum.arduino.cc/index.php?topic=417242.msg2873329#msg2873329

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