Piston Group Trial

using Sandbox.ModAPI.Ingame;
using System.Collections.Generic;
using VRage.Game.ModAPI.Ingame.Utilities;

namespace IngameScript
{
    partial class Program : MyGridProgram
    {

        public Program()
        {

        }

        public void Save()
        {

        }
        MyCommandLine _commandLine = new MyCommandLine();
        public void Main(string argument, UpdateType updateSource)
        {
            IMyBlockGroup piston_Group = GridTerminalSystem.GetBlockGroupWithName("Pushers");
            if (piston_Group == null)
            {
                Echo("Group not found");
                return;
            }
            List<IMyTerminalBlock> blocks = new List<IMyTerminalBlock>();
            piston_Group.GetBlocks(blocks);
            foreach (var piston in blocks)
            {
                if (_commandLine.TryParse("Extend"))
                {
                    piston.Extend();
                }
                if (_commandLine.TryParse("Reverse"))
                {
                    piston.Retract();
                }
            }

        }
    }
}