If you just want to change the colour use a pen to colour it or anything that you can wrap it with that will allow light to pass through :)
And I do have a serious side. I get told a lot I quote "You don't know Jack **** do you?" And took that seriously.
So I went to find out who Jack **** is. Jack **** is actually the only son of Awe ****, who married O ****, the owners of Knee Deep n' **** ltd. had 6 beautiful children: Holy ****, Giva ****, Fulla ****, Bull **** and the twins, Deep **** and Dip ****. Deep **** married Dumb ****, A College drop out. That was as far as I found I was wiping it down on **** paper, as the police came busting through the door and had to flush the evidence before I got in a Lota ****. But now you know I am a serious person really.