setEffectScaleOnPosition

--Scale the specified special effect at the specified position
--The first three parameters are the coordinates of the special effect to be scaled
--The fourth parameter is the special effect id to be scaled
--The last parameter is the set scale ratio
World:setEffectScaleOnPosition(0,7,0,1001,2)
--Display in the chat box
Chat:sendSystemMsg("Enlarge the smoke special effect at the height 7 position (0,0) by two times")