How to be a right page pagination in GO

I want to handle page pagination in Go.

This is my code right now:

// Item size like call 2 item from database
var pagesize = 2
    var  PaginationSize int = 6
Pagination := make([]int, PaginationSize)
    for i := 0; i < PaginationSize; i++ {

        if RequestPageNumber <= page {
            Pagination[i] = i + 1
        }else{
            Pagination[i] = RequestPageNumber + i
        }

        // Make it active
        if  i == 0 {
            Info.Pagination += template.HTML(fmt.Sprintf(`<li class="page-item active"><a class="page-link" href=?id=%v>%v</a></li>`,RequestPageNumber + i ,RequestPageNumber + i))
        }else{
            Info.Pagination += template.HTML(fmt.Sprintf(`<li class="page-item"><a class="page-link" href=?id=%v>%v</a></li>`,RequestPageNumber + i ,RequestPageNumber + i))

        }

    }

The main problem is handle active page, for example active page always the first pagination:

1, 2, 3, 4, 5, 6

I want to be do it pagination page change only after number 6 (PaginationSize )

Look like 7, 8, 9, 10, 11, 12 ,13 ,14

but mine code work like this when user click on number 2:

(2), 3, 4, 5, 6, 7

also handle pagination when data in database over if possible. Thanks.

Live example to what i want to do: https://www.solodev.com/blog/web-design/adding-pagination-to-your-website.stml