function update_event()
    ballx, bally, ballz = ball:getPosition()
    ag.setCamera(7, -6, 15, ballx, bally, ballz, 0, 0, 1)
    if (ag.isKeyDown("m")) then
        ball:setPosition(-7, 7.4, 12)
    end
end

function key_pressed_event(key)
    if (key == "d") then
        ball2:destroy()
    end
end

arena = ag.loadStaticModel("boxarena")
ball = ag.loadModel("checkerball")
ball:setPosition(-7, 7.4, 12)
ball2 = ball:clone()
ball2:setPosition(-7, 7.4, 14)
ball3 = ball:clone()
ball3:setPosition(-7, 7.4, 16)
logo = ag.loadModel("dwlogo", 0.5)
logo:setPosition(-1, 2, 11)
crate = ag.loadModel("crate")
crate:setPosition(-5, -3, 10)