Your picnic just got a whole lot cuter with this DIY. 1. Sketch out your design on a piece of paper. 2. Cut your drop cloth to size if necessary. 3. Use a pencil to outline your design on the drop cloth. Paint over your design, then let dry. 4. Once dry, flip over your drop cloth and iron over the painted sections to seal the paint. 5. Hem picnic blanket with a sewing machine. That's it!