objects/oBatTarget/create.gml
From spelunky.gmk, Spelunky Classic 1.1's source, © 2008, 2009 Derek Yu and Mossmouth, LLC, shown whole under the Spelunky User License v1.1b. Extracted by spelunky.ai's tools, an unofficial fan project, one file per script or event; the // ==== lines are the extractor's, naming each action of the event. Some scripts are others' work that Derek Yu credits in the source's readme.txt: Martin Piecyk's platform engine, ChevyRay's view scaling scripts and tsg1zzn's Super Sound System.
oBatTarget's create event, 14 lines of GML.
bloodless = false;UP = 0;DOWN = 1;dir = 1;if (x == 208) difficulty = 2;else if (x == 256) difficulty = 4;else difficulty = 1;xMid = x;xDiff = 0;if (oMoonRoom.timer <= 20){ difficulty += 2; sprite_index = sUFO;}