SGnG print object limits

while true do
    objectSlots = bit.arshift(mainmemory.read_s8(0x1443), 1) + 1
    weaponSlots = bit.arshift(mainmemory.read_s8(0x1445), 1) + 1
    magicSlots = mainmemory.read_s8(0x1447)

    upgradeSlots = 0
    offset = 0x10EE
    for i = 1, 3, 1 do
        if mainmemory.read_u8(offset) == 1 then upgradeSlots = upgradeSlots + 1 end
        offset = offset + 0x41
    end

    color1 = 0xFFFFFFFF
    color2 = 0xFFFFFFFF
    color3 = 0xFFFFFFFF
    color4 = 0xFFFFFFFF
    if objectSlots == 0 then color1 = 0xFFFF7777 end
    if weaponSlots == 0 then color2 = 0xFFFF7777 end
    if magicSlots == 0 then color3 = 0xFFFF7777 end
    if upgradeSlots == 3 then color4 = 0xFFFF7777 end

    gui.text(0,  64, "obj " .. 31-objectSlots .. "/31", color1)
    gui.text(0,  79, "wpn " .. 10-weaponSlots .. "/10", color2)
    gui.text(0,  94, "mag " .. 8-magicSlots .. "/8", color3)
    gui.text(0, 109, "upg " .. upgradeSlots .. "/3", color4)

    emu.frameadvance()
end