Cut the chocolate into smaller pieces

Put it in a clean,dry bowl glass or metal bowl

Heat some water in a smaller sufuria

Put the bowl with chocolate on the one with water n let it melt

Measure the circumference and height of your cake and cut your bubble wrap in that size

Pour your melted chocolate on the bubblewrap n even out with your spatula

Let the chocolate set before you wrap on your cake.put in the fridge till hardened n peel of the bubble wrap