Plat_DownWaitUpStayLip
From ZDoom Wiki
206:Plat_DownWaitUpStayLip (tag, speed, delay, lip, sound)
tag: Tag of affected sector speed: Speed of move delay: Tics between rise and falls lip: Amount of floor to leave showing when platform is lowered sound: if 0 the platform sound is used, if 1 the moving floor sound is used
Lowers a platform, waits, and then raises it back to its original position. If tag is 0, then the sector on the line's back side is used.

