// width and height of my area
    let w = f w
    let h = f (h - 30)

    // element size (min) and element margin
    let el_s = f 100
    let el_m = f 25

    // how many elements + margin we can fit in one row (with fractions)
    let n = max 1.0f ((w - el_m) / (el_s + el_m))

    // how many elements floored
    let y = int n

    // how much extra space we got left over
    let x = n - (f y)

    // how much extra size we need to add to each element, giving the final el_s
    let s = ((w - el_m) * (x / n)) / (f y)

    // final size of each element
    let el_s' = int (el_s + s)