simple-routine

function main()
    local turb=peripheral.wrap("back")
    local energymax=900000
    local energylow=100000
    while true do
        energy=turb.getEnergyStored()
        if energy > energymax and turb.getActive() == true then
            turb.setInductorEngaged(false)
            turb.setActive(false)
        end
        if energy < energylow and turb.getActive() == false then
            turb.setInductorEngaged(true)
            turb.setActive(true)
        end
        sleep(1)
    end
end

main()