Spotted this simple little DIY project this wet and windy weekend, on here, via here its so simple yet very effective. You will need a black permanent marker, double sided sticky tape, and a star stencil.
Save this one and print off on an A4 piece of paper.
* Cut out star with a craft knife to create the stencil
* Edge the star with double sided sticky tape.
* Position the star on surface then with a marker fill in
the exposed area.