Custom Function Sticky

The level editor allows for special effects to be added to stages. These effects are encapsulated in the "custom function" object, code 99.

The Custom Function object can cycle through many different functions, and those functions are listed out here.

Other custom functions can be suggested, as there's a lot of untapped potential in the feature.

Supported Custom Functions

1. BGSEQFRZ: Background Sequence Freeze: Prevents the sun from setting or rising in levels.
   
2. BORD: Border. Places a black border around the level.