function display()
    for id = 0, 23 do
        local base = 0x0de2 + id * 94
        local sprite_number = u16(base)
        local xpos = u16(base + 0x06)
        local ypos = u16(base + 0x0a)

        if sprite_number == 0x1e0 then
            local sub_action = u8(base + 0x1d)
            local action = u16(base + 0x2e)
            local pointer = u16(base + 0x3c)

            -- proximity
            local width = u8(base + 0x4c) - 1
            local height = 0x29 * 2 - 1
            local border = action == 0 and 0x40ff0000 or 0x60ffffff
            local bg = action == 0 and 0xa0ff0000 or 0xd0ffffff
            local xend = (xpos - width) + 2 * width
            xend = math.min(xend, 879) - Camera_x
            local yend = 2 * height
            draw.box((xpos - Camera_x - width), (ypos - Camera_y - height), xend, yend, border, bg)
        end
        draw.pixel(xpos - Camera_x, ypos - Camera_y - 1, 0xffffff, 0x60000) -- interaction with tiles
    end
end