vci.StartCoroutine(
    coroutine.create(
        function()
            print("Coroutine start")
            local i = 0
            while i < 10 do
                -- Counts
                print(i)
                i = i + 1
                -- Sleep for 0.5 seconds
                sleep(0.5)
            end
            print("Coroutine end")
        end
    )
)

function sleep(sec)
    local t0 = os.time() + sec
    while os.time() < t0 do
        -- Stop the coroutine
        coroutine.yield()
    end
end