action artistic attack dance fight flesh gimnastic girl happy help hold jump lean man movement quarrel shake sport welcome adults barrier barriers ccrowds control controlled controlling crowd entering families gathered gathering guided guided-movement large-crowd men mobile-barriers on-the-move pedestrians people public shadows shelter sheltered sunlight sunny sunshine thoroughfare underpass visitors walkers walking women cave dark light stones tide waterfall color colour gradient illusion colored lines lines rainbow abstract background elements glass green red rings orange sphere alpha alpha channel challenge change Easter experience innovation life. transformation trees wood