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