ABC Diet or 1200 calorie diet with PHENTERMINE?

I tried the ABC diet before but after 2 days I gave up. It's a tough diet to do but I do know some people who have completed it and lost a few pounds. I now eat about 500-1200 calories a day and sometimes I work out. This seems to be working for me. I'm 5'4 as well and I weigh 112 pounds. I'm 15 years old too, at our height and age we should be consuming at least 1800 calories a day and if we are active we should eat 2000. Now to me that seems like a lot but it's supposed to be a healthy amount if you eat the right foods. So even though 1200 calories is below the "healthy" amount of calories we should be taking I'm each day, it's healthier and easier to do every day instead of the abc diet. That's just my opinion though based on my experience. It can also be hard for your body to adjust to a different calorie intake everyday while you do the abc diet. It's going to be hard on you to drastically change the amount of food you eat everyday and it's going to take a toll on you too. What I mean by that is you will be tired and most likely get dizzy from not having energy or food in you so I suggest that you try sticking to a low calorie diet but you probably shouldn't go under 1200. Eat fruits and veggies they have hardly any calories and they will fill you up.