ind = 22
function init()
    setmode(2)
    map = {}
    for i=0,299 do
        map[i] = 32
    end
    map[ind] = 65
end

function update()
    if btn(KEY_TAB) then
        for i=0,255 do
            poke(i, i)
            poke(300+i, 0x0f)
        end
        local mx, my = mousex(), mousey()
        poke(300+(mx+my*20), 0x4e)
    else    
        for i=0,299 do
            poke(i, map[i])
        end
    end
end