I have fat around my chest and my pecs how do I make my pecs smaller and reduce my fat so I can my six pack

You have to do cardio. The idea to do chest exercises and ab exercises to reduce fat around that specific area is called "spot reduction". It does not work. Fat is lost over the whole body, you cannot target fat loss. I recommend at least 2 thirty minute cardio sessions per week. I recommend jogging or biking. Swimming is also a low impact activity. I also recommend a diet if you have problems eating junk food.