for x in range(0, outer_border[0]):
            for y in range(0, outer_border[1]):
                # Bottom row
                collision_list.append((0, y))
                # Upper row (bottom row + width as offset)
                collision_list.append((outer_border[0] - 1, y))

                if(x <= inner_border[0][0] and y <= inner_border[0][1]):
                    # Append x, y coordinates with bottom left x / y as offset
                    collision_list.append((x + inner_border[1][0], y + inner_border[1][1]))

            # Bottom row
            collision_list.append((x, 0))
            # Upper row (bottom row + height as offset)
            collision_list.append((x, outer_border[1] - 1))