mappy.msgBox ("Show mouse coords", "You need to load or create a map first", mappy.MMB_OK, mappy.MMB_ICONINFO)
else
local x = mappy.getValue (mappy.MOUSEBLOCKX)
local y = mappy.getValue (mappy.MOUSEBLOCKY)
mappy.msgBox("Show mouse coords", "This script should be run from a keypress, see 'Key Shortcuts' in the docs. Mouse is over block "..x..", "..y..". Useful for writing scripts which modify the map at mouse location...", mappy.MMB_OK, mappy.MMB_ICONINFO)