What did I do wrong with my heating fixtures?

Ok, I have been trying to set up my habitat for my future bearded dragon just so I wouldn't have to spend time experimenting when he's actually here. So from what i gathered and was told, I should have a day lightbulb and a UV lightbulb. Should I get a heating pad for under the tank on te warmer side? Please explain what i should set this up like, also, make sure it's understandable for a beginner. I'll get it eventually I just need help starting out.