//Use Line special "121" to identify the line you want to break through. Give it a middle texture and set to "impassible"
//Make the line triggered by "projectile hits" or "projectile hits or crosses" or by "use" if you want it triggered by "use"-ing

//you will also need to place a map spot for the quake epicentre (ideally on the line), and some map spots to spawn rocks / debris


Script 1 OPEN
{
Setlinespecial(1,80,2,0,0,0,0);		//sets the identified line to execute script 2 when triggered
}






script 2 (void)			//wall breaking script
{
int x;					//set to whatever letter is free, or leave as "x", this is just a timer for spawning debris
x=0;
Setlinespecial(1,0,0,0,0,0,0);		//deactivates the line, so it can't be triggered again
Radius_Quake(1,60,0,30,98);		//earthquake
ambientsound("rocks",1.0);		//sound of rocks, you will need to define your wall collapsing sound in SNDINFO
setlinetexture(1,SIDE_FRONT,TEXTURE_MIDDLE,"BLANK");	//set the front of the line to be see-through
setlinetexture(1,SIDE_BACK,TEXTURE_MIDDLE,"BLANK");	//set the back of the line to be see-through
Line_setblocking(1,0,1);				//set the line to no longer block anything
while( x < 30)						//spawn some rocks and debris
{
Thing_projectile(98, random(41,49), random(0,255), random(10,50), random(30,-255));	//"98" here is the map spot to spawn at. "random(41,49)" is a whole lot of rocks (this is from a hexen based mod, so check the spawn numbers of whatever debris you want to spawn by looking up spawn numbers of your selected base wad)
Thing_projectile(99, random(41,49), random(0,255), random(10,50), random(30,-255)); //more debris to spawn at a different location (map spot 99)
delay(1);
x++;
}
}

//you can have a few different map spots littered around your wall, up to 4 or 5 if you like, just add more Thing_projectile lines with the right spot ID in them