Ceiling_CrushAndRaiseA

From ZDoom Wiki

196:Ceiling_CrushAndRaiseA (tag, dspeed, uspeed, crush [,crushmode])

tag: Tag of affected sector 
dspeed: How quickly the ceiling moves down 
uspeed: How quickly the ceiling moves back up 
crush: Amount of damage to apply 
crushmode: Sets the crushing mode (development version only)

Usage

Lowers and raises the ceiling of the affected sectors continually, applying crushing damage to anything underneath it. If tag is 0, then the sector on the line's back side is used.

Examples

As the ceiling specials are fairly trivial, examples of every one can be found in the example wad, Squash. This wad runs on Map01 of Doom2.