Okay. This is not the best weight loss plan for many reasons. First of all it is not sustainable. Even if you lose weight, there is a high likely hood of regaining it as you aren't creating healthy habits. It also leads to an increased chance of binging because you will be hungry.
Your body needs fuel. If you eat the right things that is much much better for your body. If your body doesn't get enough food then there isn't enough glucose. Glucose is what is used for energy. If there isn't enough of this, your body will end up producing ketones. Problem with this is that your red blood cells (that carry oxygen around your body) can't use ketones as an energy source and your brain can only use them to a limited degree. Fasting for a few days at a time is not healthy.
A sudden decrease in weight loss can be dangerous and can cause lots of damage to your body.
I would suggest looking into proper nutrition/nutritional theory. Figure out how many carbs and protein you need. Set yourself a calorie deficit (no less than 1600 is what I've seen recommended but to start maybe only go 200 below the average recommended which is for women 2000 so 1800). Try to exercise 4-5 times a week. Creating a routine and healthy diets will mean that the weight loss is able to be maintained and that when you reach your target weight you will be able to stay there.
If you stick with fasting you will reach your target weight then what? start eating normally again and put the weight back on? Keep fasting and losing weight to a completely dangerous weight?
Wanting to lose weight is fine but please try to do it healthily