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CHAPTER 14. FRACTALS AND KINETIC GROWTH MODELS 524}pys [ n ] = ys [0]+ ny [ n ] ;s i t e [ pxs [ n ] ] [ pys [ n ] ] = ( byte ) 2 ;}perimeterNumber = 4 ;public void s t e p ( ) {i f ( perimeterNumber >0) {int p e r i m e t e r = ( int ) (Math . random ( ) * perimeterNumber ) ;int x = pxs [ p e r i m e t e r ] ;int y = pys [ p e r i m e t e r ] ;perimeterNumber −−;pxs [ p e r i m e t e r ] = pxs [ perimeterNumber ] ;pys [ p e r i m e t e r ] = pys [ perimeterNumber ] ;i f (Math . random()