How to take a photo with a clear white background?

First you need to make light box.

You can use any recycled cardboard depends on how big you want

Then cut of the cap of the cardboard and four squares on four sides

Next, cut four thin whit paper which should be a little bit bigger than the squares we cut

Glue the paper on the outside of cardboard where we cut squares

Finally, put a thick white paper in the box to make as a background of the subject

Settle the light as long as you like, and you can this kind of pictures!