How can I have 2 variables for one output?

Question

I need it so that the spacebar does one thing on one frame and another thing on the other.
I have solved this but now I need to know how can I have it so 2 variables = 1 output.
This is my code at the moment:
while (menu)
if (changecharacter)
gotoAndStop(2);
menu = false

Answer 1

My whole code is:
var menu:Boolean = true
stop();
var leftPressed:Boolean = false;
var rightPressed:Boolean = false;
var changecharacter:Boolean = false;
Block.addEventListener(Event.ENTER_FRAME, fl_MoveInDirectionOfKey);
stage.addEventListener(KeyboardEvent.KEY_DOWN, fl_SetKeyPressed);
stage.addEventListener(KeyboardEvent.KEY_UP, fl_UnsetKeyPressed);
Block.gotoAndStop(1)
function fl_MoveInDirectionOfKey(event:Event)
          if (leftPressed)
                    Block.x -= 3;
          if (rightPressed)
                    Block.x += 3;
          if (changecharacter)
                    Block.gotoAndStop(2);
          while (menu)
          if (changecharacter)
                    gotoAndStop(2);
                    menu = false
function fl_SetKeyPressed(event:KeyboardEvent):void
          switch (event.keyCode)
                    case Keyboard.LEFT:
                              leftPressed = true;
                              break;
                    case Keyboard.RIGHT:
                              rightPressed = true;
                              break;
                    case Keyboard.SPACE:
                              changecharacter = true;
                              break;
function fl_UnsetKeyPressed(event:KeyboardEvent):void
          switch (event.keyCode)
                    case Keyboard.LEFT:
                              leftPressed = false;
                              break;
                    case Keyboard.RIGHT:
                              rightPressed = false;
                              break;
                    case Keyboard.SPACE:
                              changecharacter = false;
                              break;