local function Attack()
    --Fast multi-layer circle
    local pat = Pattern()
    pat:SetType(PATTERN_CIRCLE)
    pat:SetShot({"CROSS_PINK_INV", "CROSS_RED_INV", "BILL_PURPLE_INV"})
    pat:SetCount(10, 3)
    pat:SetSpeed(5, 0.2)
    pat:SetRadius(64)
    pat:SetAimed(true)

    while true do
        pat:SetAngle(0)
        for i = 1, 15 do
            pat:Fire(objBoss)
            pat:Rotate(7.523)
            wait(10)
        end

        objBoss:MoveRandom(-128, 64, 128, 160, 60)
        wait(80)
    end
end