function init()
    setmode(1)
    reset()
end

function reset()
    bx,by=20,28
    dx,dy=-1+rnd(1)*2,-1
    px=18
    wait=1
    speed=6
    bricks = {}
    for i=0,35 do bricks[i]=COLOR_RED end
    for i=36,71 do bricks[i]=COLOR_BROWN end
    for i=72,107 do bricks[i]=COLOR_GREEN end
    for i=108,143 do bricks[i]=COLOR_YELLOW end
end

function update()
    -- move ball
    wait=wait-1
    if wait==0 then
        wait=speed
        bx=bx+dx
        by=by+dy
        if speed<6 then
            if bx==2 or bx==37 then dx=-dx play("o3l0c") end
            if by<9 then
                local index=flr(bx/2)-1+(by-1)*18
                if bricks[index]~=COLOR_BLACK then
                    play("o5l0c")
                    bricks[index]=COLOR_BLACK
                    dy=-dy
                else
                    if by==1 then dy=-dy play("o3l0c") end
                end
            end
            if by==28 and bx>=px and bx<=px+4 then
                play("o4l0c")
                dy=-dy
            end
            if by==29 then
                play("l0o3bagfedc")
                reset()
            end
        else
            if bx==2 or bx==37 then dx=-dx end
            if by==9 or by==29 then dy=-dy end
        end
    end

    -- move paddle
    if btn(KEY_LEFT) and px>2 then px=px-1 end
    if btn(KEY_RIGHT) and px<34 then px=px+1 end

    -- clear screen
    paper(COLOR_BLACK)
    cls()

    -- draw white border
    ink(COLOR_WHITE)
    print("\150\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\154\156",1,0)
    for i=1,29 do
        print("\149",1,i)
        print("\149",38,i)
    end

    -- draw bricks
    for i=0,143 do
        color(0,bricks[i])
        print("\095\003",2+2*(i%18),1+flr(i/18))
    end

    --draw ball
    color(COLOR_WHITE,COLOR_BLACK)
    print("\233",bx,by)

    -- draw paddle
    ink(COLOR_LIGHT_BLUE)
    for i=0,3 do print("\131",px+i,29) end

    if speed==6 then
        ink(rnd(16))
        print("BREAKOUT",16,13)
        ink(COLOR_WHITE)
        print("Press '1' to play EASY",9,18)
        print("Press '2' to play NORMAL",8,20)
        print("Press '3' to play HARD",9,22)

        if btn(KEY_1) then reset() speed=4 end
        if btn(KEY_2) then reset() speed=3 end
        if btn(KEY_3) then reset() speed=2 end
    end
end