How do you beat level 37 red remover

Click all of the red box, except for the one on the left. Just below the remaining red box, there are two blue boxs. Click the blue boxs on the right. Then, beside the remaining red box, there is a blue box with a green box on it. Click that blue box. Then click the remaining red box.

Sorry if this sounds confusing. You will get it eventually if you're confused though! ;)