SE TRAIN CONTROLER

.cs

float targetSpeed;

public Program()
{
    // Initialize Storage
    if (String.IsNullOrEmpty(Storage)) Storage = "0.0";
    targetSpeed = float.Parse(Storage);
}

public void Save()
{
    // Save Storage
    Storage = targetSpeed.ToString("0.00");
}

public void Main(string argument, UpdateType updateSource)
{
    // Left Wheels
    var leftWheelsListGeneric = new List<IMyTerminalBlock>();
    var leftWheelsGroup = GridTerminalSystem.GetBlockGroupWithName("LeftWheels") as IMyBlockGroup;
    leftWheelsGroup.GetBlocks(leftWheelsListGeneric);
    var leftWheelsList = leftWheelsListGeneric.Cast<IMyMotorSuspension>().ToList();

    // Right Wheels
    var rightWheelsListGeneric = new List<IMyTerminalBlock>();
    var rightWheelsGroup = GridTerminalSystem.GetBlockGroupWithName("RightWheels") as IMyBlockGroup;
    rightWheelsGroup.GetBlocks(rightWheelsListGeneric);
    var rightWheelsList = rightWheelsListGeneric.Cast<IMyMotorSuspension>().ToList();

    // Cockpit
    var cockpit = GridTerminalSystem.GetBlockWithName("MainCockpit") as IMyTextSurfaceProvider;

    // Screens
    var screen0 = cockpit.GetSurface(0) as IMyTextSurface;
    var screen1 = cockpit.GetSurface(1) as IMyTextSurface;
    var screen2 = cockpit.GetSurface(2) as IMyTextSurface;

    // Setup screens
    screen0.FontSize = 3;
    screen1.FontSize = 3;
    screen2.FontSize = 3;
    
    // Adjust speed   
    targetSpeed +=  argument.Equals("up") ? 5f : -5f;

     // Inform user
    screen0.WriteText(String.Format("Target Speed\n{0:f}\n", targetSpeed));

    var shouldStop = Math.Abs(targetSpeed) <= 0.001;

    // Set speed to left wheels
    foreach (var leftWheel in leftWheelsList) {
         leftWheel.Propulsion = !shouldStop;
         leftWheel.Brake = shouldStop;
         leftWheel.PropulsionOverride =  Math.Sign(targetSpeed) * 100;
         leftWheel.SetValue<float>("Speed Limit", targetSpeed);
    }

    // Set negative speed to right wheels
    foreach (var rightWheel in rightWheelsList) {
         rightWheel.Propulsion =  !shouldStop;
         rightWheel.Brake = shouldStop;
         rightWheel.PropulsionOverride = -1 * Math.Sign(targetSpeed) * 100;
         rightWheel.SetValue<float>("Speed Limit", targetSpeed);
    }
}