"Calibration" Problem

In my previous post, I mentioned having trouble calibrating a temperature range, but when I woke up this morning I suddenly realized there was actually just a problem in my code.  So I've fixed that issue and my project works now.

First Project - "Blink"

For my first project, I decided to make an LED thermometer which can have its overall brightness adjusted.  I quickly realized I wouldn't be displaying exact temperatures, but the idea is to have a line of LEDs that light up as temperature increases.  So a low temperature might result in one fully lit LED (where "fully" is defined by the brightness setting) and a half-lit LED, with all other LEDs off.

This is what I ended up with.  It has 6 LEDs on one side, and on the other, a temp sensor and a potentiometer.  I think it works, but I've been having some trouble getting a good temperature range calibrated, especially in my room.