Simple Arduino / Teensy macro keypad

macropad.ino

int button[5];
bool curPressed[5];
bool pressedD = false;
bool pressedM = false;
void setup()
{                
  Serial.begin(38400);
}

void loop()                     
{
  // set button array to analog pins
  for (int i = 0; i < 5; i++) {
    button[i] = analogRead(i);
  }
  // button 1 pressed
  if (button[0] > 1000) {
    // check holding
    if (!curPressed[0]) {
      curPressed[0] = true;
      Keyboard.press(MODIFIERKEY_ALT);
      Keyboard.press(KEY_L);
      Keyboard.press(KEY_M);
      Keyboard.release(MODIFIERKEY_ALT);
      Keyboard.release(KEY_L);
      Keyboard.release(KEY_M);
      Serial.println("button 1");
    } 
  } else {
    curPressed[0] = false;
  }
  // button 2 pressed
  if (button[1] > 1000) {
    // check holding
    if (!curPressed[1]) {
      curPressed[1] = true;
      if (!pressedD) {
        pressedD = true;
        Keyboard.press(KEY_W);
      } else {
        pressedD = false;
        Keyboard.release(KEY_W);
      }
      Serial.println("button 2");
    } else {
      curPressed[1] = false;
    }
  }
  // button 3 pressed
  if (button[2] > 1000) {
    // check holding
    if (!curPressed[2]) {
      curPressed[2] = true;
      if (!pressedD) {
        pressedM = true;
        Mouse.set_buttons(1, 0, 0);
      } else {
        pressedM = false;
        Mouse.set_buttons(0, 0, 0);
      }
      Serial.println("button 3");
    } else {
      curPressed[2] = false;
    }
  }
  delay(250);
}