1startshape SPIKES 2tile {s 70 0} 3background {b 1 sat 1 a -0.5} 4rule SPIKES { 5 4* {r 90} SPIKE {} 6} 7 8rule SPIKE { 9 LSPIKE {} 10} 11rule SPIKE { 12 LSPIKE { flip 90 } 13} 14 15rule LSPIKE { 16 SQUARE {} 17 LSPIKE { y 0.98 s 0.99 r 1} 18} 19rule LSPIKE 0.01 { 20 SPIKE { r 90 } 21 SPIKE { r -90 } 22 LSPIKE { y 0.98 s 0.99 r 1} 23} 24