black construction danger erection protection red scaffold scaffolding sign warning warning sign abstract background clipart design flourish glow graphic illustration light pattern swirl city classic electric groningen lamp lamppost silhouette street vector white backdrop blowball Dandelion dark green inversion inverted seed seeds texture border copyspace frame grunge grungy rough rugged rustic window blackened branch branches burn burned bush bushes countryside fields fire gorse cloud foreboding gather grey imminent sky storm threatening violence violent