Code 2

var Counter;
for (Counter = 1; Counter <= 25; Counter += 1) //From 1 to 25 (inclusive)
{
    //inv items
    if slot_inv[Counter] != 0
    {
        draw_sprite(slot_inv[Counter].sprite_index, 0, view_xview[0] + 16 * Counter, view_yview[0] + 568 + 16);
    }
}