Rpg Maker Developers Group

Hi there, I've been stumped with this for about an hour now so I'm gonna see if anyone can take a crack at it.

I want to change a tile (i.e. the mirror) to a different tile (i.e. broken mirror) after a certain amount of time. In the particular scene, my character is walking through a dark room and several mirrors begin to break on a timer. The mirrors breaking are meant to scare the player and hurry them through the map. 

Only problem is I can't get them to change tiles. I've used the "Set move route" command, photoshopped my own image sizes to fit in the "characters" file to change the graphic, tried "change tilesets" that didn't work at all. I'm also having a problem with the autorun and parallel process function because the only way, that I've tried, the mirror changes AT ALL is if the event is in autorun mode and no erase event so my character can even move which defeats the whole purpose of RUNNING as the mirrors break.

I don't know where to begin, but I'm hungry so imma grab a sandwhich and see if any of you smart peoples can figure it out!

Here are pics of a sample enviornment:

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