public void Execute(Machine machine, Stack<object> stack, Scope scope, Instruction instr)
        {
            int length;
            string name;

            switch (instr)
            {
                default:
                    throw new VMException("Something just went horribly wrong. Variable instructlet is not supposed to receive {0}", instr.ToString());

                case Instruction.SetVar:
                    length = (int)machine.TakeByte();
                    name = machine.TakeBytes(length).AsString();

                    machine.ExecuteNextInstructlet();
                    scope.SetVariable(name, stack.Pop());
                    break;

                case Instruction.GetVar:
                    length = (int)machine.TakeByte();
                    name = machine.TakeBytes((int)length).AsString();

                    stack.Push(scope.GetVariable(name));
                    break;
            }
        }