Blood splatter: paint your nail white,dip straw lightly in red polish blow out til desired look. Crime scene: The sponging; take makeup sponge,apply a dark grey polish,sponge on nail, repeat lighter grey, a little black if too grey. Take a brush and use yellow and black acrylic paint for detailing. Paint your nail black, paint white polish on the fingerprint area of a finger on your other hand. Use card to swipe across remove excess polish, roll over nail. Cleanup, then top coat your nails.