startshape BLOCK background {hue 180 sat 1 b -.9}

rule BLOCK 5 {

BLOCK { s 0.5 x 0.1 y 0.1 }
BLOCK { s 0.5 x -0.1 y -0.1 }
BLOCK { s 0.5 x -0.1 y 0.1 }
BLOCK { s 0.5 x 0.1 y -0.1 }

}

rule BLOCK 1 {

TERMINATE {}

}

rule TERMINATE 1 {

CIRCLE {a -.1}
CIRCLE { s 0.95 hue 30 sat 1 b 1 a -.5}

}

rule TERMINATE 5 {

SQUARE {hue 30 sat 0 b 1 a -.9}

}