Space Engineers Sluice Management with 2 doors, 2 lights, 1 Airvent and 1 Timer

sluice.cs

public Program() {
    // The constructor, called only once every session and
    // always before any other method is called. Use it to
    // initialize your script. 
    //     
    // The constructor is optional and can be removed if not
    // needed.
}

public void Save() {
    // Called when the program needs to save its state. Use
    // this method to save your state to the Storage field
    // or some other means. 
    // 
    // This method is optional and can be removed if not
    // needed.
}

public void Main(string argument) {
    // The main entry point of the script, invoked every time
    // one of the programmable block's Run actions are invoked.
    // 
    // The method itself is required, but the argument above
    // can be removed if not needed.

    // Read some persisted data from Storage 
    Echo("Argument from last time was " + Storage); 
 
    if (argument == "" && Storage != "") {
        argument = Storage;
    }
    else if (argument == "" && Storage == "") {
        return;
    }
    else {
        Storage = argument;
    }

    var arguments = argument.Split('-'); // For example "Sluice1-Open-Internal"
    IMyDoor door = GridTerminalSystem.GetBlockWithName(arguments[0] + " Door " + arguments[2]) as IMyDoor;
    IMyAirVent airVent = GridTerminalSystem.GetBlockWithName(arguments[0] + " Air Vent") as IMyAirVent;
    IMyTimerBlock timer = GridTerminalSystem.GetBlockWithName(arguments[0] + " Timer") as IMyTimerBlock;
    IMyLightingBlock light1 = GridTerminalSystem.GetBlockWithName(arguments[0] + " Light 1") as IMyLightingBlock;
    IMyLightingBlock light2 = GridTerminalSystem.GetBlockWithName(arguments[0] + " Light 2") as IMyLightingBlock;
    switch (arguments[1]) {
        case "Open":
            switch (arguments[2]) {
                case "Internal": 
                    if (airVent.GetOxygenLevel() == 0 && airVent.CanPressurize) {
                        light1.ApplyAction("OnOff_On");
                        light2.ApplyAction("OnOff_On");
                        airVent.ApplyAction("Depressurize_Off");
                        timer.ApplyAction("Start");
                    }
                    else if (airVent.GetOxygenLevel() == 1) {
                        timer.ApplyAction("Stop");
                        light1.ApplyAction("OnOff_Off");
                        light2.ApplyAction("OnOff_Off");
                        door.ApplyAction("Open_On");
                        Storage = ""; 
                    }
                    else {
                        timer.ApplyAction("Start");
                    }
                    break;
                case "External":
                    if (airVent.GetOxygenLevel() == 1 && !airVent.IsDepressurizing) {  
                        light1.ApplyAction("OnOff_On");  
                        light2.ApplyAction("OnOff_On");  
                        airVent.ApplyAction("Depressurize_On"); 
                        timer.ApplyAction("Start");
                    }  
                    else if (airVent.GetOxygenLevel() == 0) { 
                        timer.ApplyAction("Stop"); 
                        light1.ApplyAction("OnOff_Off");   
                        light2.ApplyAction("OnOff_Off");  
                        door.ApplyAction("Open_On"); 
                        Storage = ""; 
                    } 
                    else { 
                        timer.ApplyAction("Start"); 
                    }
                    break;
            }
            break;
        case "Close":
            Storage = "";
            switch (arguments[2]) {
                case "Internal":  
                    door.ApplyAction("Open_Off");
                    break;
                case "External":
                    door.ApplyAction("Open_Off");
                    break;
            }
            break;
    }
}