startshape FO1
background {b -1}

rule FO1 {
CARRE1 {b 1 sat 1 hue 50}
}

rule CARRE1 {
CARRE2 {}
CARRE1 {hue 1 x 1}
}

rule CARRE1 {
CARRE2 {}
CARRE1 {hue 1 y 1}
}

rule CARRE1 {
CARRE2 {}
CARRE1 {hue 1 x -1}
}

rule CARRE1 {
CARRE2 {}
CARRE1 {hue 1 y -1}
}

rule CARRE1 {
CRENEAU1 {y 1}
CARRE1 {hue 1}
}

rule CRENEAU1 {
SQUARE {}
CRENEAU1 {y 1 b -0.1}
}

rule CRENEAU1 {
SQUARE {}
}

rule CARRE1 0.1 {
}

rule CARRE2 {
SQUARE {}
SQUARE {y -0.5 x 0.5 b -0.5}
}

rule CARRE2 {
SQUARE {}
SQUARE {y -0.5 x 0.5 b -0.5}
CARRE2 {x 1}
}