function setupPins()
    for i = 1, 10 do
        if (pins[i] ~= nil) then
            pins[i]:destroy()
        end
    end
end

function setupStars()
    stars = {}
    local dist = 500
    for i = 1, 1000 do
        local star = {}
        local rx = math.random() * math.pi * 2
        local ry = (math.random() - 0.5) * math.pi
        star.x = dist * math.cos(ry) * math.cos(rx)
        star.y = dist * math.cos(ry) * math.sin(rx)
        star.z = dist * math.sin(ry)
        star.size = math.random(2, 8)
        stars[i] = star
    end
end

function drawStars()
    for i = 1, #stars do
        ag.drawPoint(stars[i].size, 1, 1, 1, stars[i].x, stars[i].y, stars[i].z)
    end
end

function init_event()
    pins = {}
    lane = ag.loadModelStatic("bowling_lane")
    setupPins()
    setupStars()
    ag.setCamera(0, -20, 5, 0, 20, 0)
end

function update_event()
    drawStars()
end