In small resealable food storage plastic bag, combine chocolate chips and oil; seal bag. Place bag in bowl of very hot water. Flex bag several times to melt chips. Cut small hole in bottom corner of bag. Working from center to outer edge, pipe chocolate to form spiral design. Working from center of spiral to outer edge draw tip of knife lightly through the spiral to form web design.
Refrigerate at least 20 min. or until serving time.