# Background commands

## Create Game Object Instance

```markdown

BG
  id=NAME
  key=value
  frame=value
  vpx=0.5
  vpy=0.5
  vpw=
  vph=
  scaleMode=

```

Create TransitionImagePack as Background game object.

- `scaleMode` : `FIT` or `ENVELOP`

## Destroy

```markdown

NAME.destroy

```

## Set properties

```markdown

NAME.set
  x=
  vpx=
  y=
  vpy=
  alpha=
  duration=1000
  ease=Linear
  repeat=0
  wait=

```

## Ease properties

```markdown

NAME.to
  x=
  vpx=
  y=
  vpy=
  alpha=
  duration=1000
  ease=Linear
  repeat=0
  wait=

```

or

```markdown

NAME.yoyo
  x=
  vpx=
  y=
  vpy=
  alpha=
  duration=1000
  ease=Linear
  repeat=0
  wait=

```

## Call methods

### Transition image

```markdown

NAME.cross
  key=
  frame=
  duration=
  mode=fade
  wait=true

```

- `mode` : Pre-build effects
    - Fade effects : 
        - `'fade'` : Tint old image to black, then tint new image from black to origin color.
        - `'crossFade'` : Ease alpha of old image from 1 to 0, and ease alpha of new image from 0 to 1 at the same time.
    - Slide effects : `'slideLeft'`, `'slideRight'`, `'slideUp'`, `'slideDown'`, 
      `'slideAwayLeft'`, `'slideAwayRight'`, `'slideAwayUp'`, `'slideAwayDown'`, 
      `'pushLeft'`, `'pushRight'`, `'pushUp'`, `'pushDown'`.
    - Zoom(scale) effects : `'zoomOut'`, `'zoomIn'`, `'zoomInOut'`.
    - Mask effects : `'wipeLeft'`, `'wipeRight'`, `'wipeUp'`, `'wipeDown'`,
      `'irisOut'`, `'irisIn'`,  `'irisInOut'`, `'pieOut'`, `'pieIn'`, `'pieInOut'`, 
      `'blinds'`, `'squares'`, `'diamonds'`, `'circles'`, `'curtain'`.
    - Shader effects : `'pixellate'`, `'dissolve'`, 
      `'revealLeft'`, `'revealRight'`, `'revealUp'`, `'revealDown'`

### Shake

```markdown

NAME.shake
  duration=
  magnitude=
  wait=true

```