Eyebrows???? Filling in?

I got a eyebrow filller kit thing. It comes with a dark brown and a light brown- That was the kit the makeup artist girl at sephora told me to get. I already have dark eyebrows. My eyebrows are fine, but on my left side of my eyebrow it's where the eyebrow starts, they're are some spaces on skin showing. So i got the filler used dark brown and light brown and tried stroking it turned weird. Any help? Tips????