That really is something you might want to look at straight away. Linking gangs in this way is a common cause of house fires and should be avoided in all circumstances.
The ones on the tree are generally static. But when everybody else has headed off to bed and most of the room lights are switched off and it is just me and the last embers of the fire burning in the grate, I sometimes indulge myself and switch them to gently twinkling, if only to extract maximum...