startshape SPIKES
rule SPIKES {
SPIKE {} SPIKE { r 90 } SPIKE { r 180 } SPIKE { r 270 }
}
rule SPIKE {
LSPIKE {}
} rule SPIKE {
LSPIKE { flip 90 }
}
rule LSPIKE {
SQUARE {} LSPIKE { y 0.98 s 0.99 r 1}
} rule LSPIKE 0.01 {
SPIKE { r 90 } SPIKE { r -90 } LSPIKE { y 0.98 s 0.99 r 1}
}