DIY Reverse Ombre Hair

So my mother wanted to dye her hair and she realized at night that she wanted to do it.All she got at home was a brown dye and a red one.So we couldn't buy any dye because everything was closed.Her hair color was a light blonde.I told her to do an ombre hair effect.The problem was that if she had to dye her roots so we decided to try to dye her hair from the roots to the ends of the hair and leave the ends blonde.We thought about how we could do that and we came up with this idea:
 We covered the ends, acutally half of her hair(she wanted it that way) with alu foil and used hair elastics so that the foil does not fall down.We parted the hair in six parts.

 I apllied the dye as normal.Make sure that the hair is covered about 1cm more than you want the lighter color to be because some color will get under the foil and will give it the cool blended look.