local stars={}
for i=0, 16 do add(stars,{x=rnd(128),y=rnd(128),px=x,py=y,c=7}) end --px and py are equal to x and y

drwmenu=function()
    if btn(2) then menuind-=1 end
    if btn(3) then menuind+=1 end
    menuind=mid(0,4)

    for v in all(stars) do
    print(v.px) --prints nil 
    print(v.py) --prints nil
        line(v.x,v.y,v.px,v.py,v.c)
        --line(v.x,v.y-128,v.px,v.py,v.c)
        --v.py=v.y

        --v.y+=8
        if v.y > 127 then v.y-=128 end
    end
    if (time()-last > 1) then
        rectfill(0,112,127,120,1)
        print("press start!",0,114,7)
        if (time()-last > 2) then last=time() end
    end
end

for i=0, 16 do
 local x,y=rnd(128),rnd(128)
 add(stars,{x=x,y=y,px=x,py=y,c=7})
end