Cut the muslin to your desired size and shape. In the meantime turn on your burner and melt your wax completely in the top boiler pot! it'll take a bit to melt. This makes the house smell like honey!!
Tape the muslin with a piece of newsprint underneath to board, stretch it tight and tape all sides completely!
Draw with a pencil lightly what you will be drawing, if you are not good at drawing cut the picture out and trace it! Just remember draw lightly! Start by assessing what you want to be white.