Question about doing atkins diet?

Im a 14 year old boy and want to lose some weight rather quickly. I know the atkins diet is bad for your body but it really works. Is this a good strategy? if i do the atkins diet for a week or two until i lose the weight i want to then get off it and then only eat healthy like fruits vegatables, no white bread etc. Will this works or will i just gain the weight back? please help, thanks:)