Puck.js with LDR - how to deal with light that is always on?

so I am trying to understand when does it actually set pinmode, if the condition when everything is ok is setting it to false...

Lets say the LED is off, and pulledUp==false... The flow of execution looks like this:

  // pulledUp==false, so pinMode(D2,"input_pullup"); is called
  if (!pulledUp) pinMode(D2,"input_pullup");
  // LED off, so D2.read() == true
  if (D2.read()) { // LED is off - all ok
    // we execute in here
    onCount = 0;
    pulledUp = true;
  } else {
    // not executed
  }
  // pulledUp is now true, so this is not executed
  if (!pulledUp) pinMode(D2,"input");

So at the end of that, pulledUp==true, but pinMode(D2,"input_pullup"); was called at the start of the function